54.39.6.109📋 Copy

# IPDEBRIEF INTELLIGENCE BRIEFING

Target: 54.39.6.109/32

Classification: Moderate Risk / Legitimate Infrastructure

Report Date: 2026-06-28

Analyst: IPDebrief Intelligence Team

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## EXECUTIVE SUMMARY

IP 54.39.6.109 is a Canadian OVH CloudCompute host associated with the ahrefs.net domain infrastructure. While the IP itself shows no direct malicious indicators, it operates within a /24 subnet demonstrating elevated abuse density (0.668). The IP is currently firewalled with no active services. SOC analysts should monitor neighborhood-level activity rather than blocking at the individual IP level.

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## TECHNICAL PROFILE

Network Classification

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.6.0/24
• Infrastructure Type: CloudCompute (OVH hosting provider)
• Geolocation: Beauharnois, Quebec, Canada (CA)
• Geolocation Confidence: Consensus verified across 2 sources

DNS Resolution

• PTR Record: proxy-ca001-san109.ahrefs.net
• Domain: ahrefs.net (legitimate SEO analytics platform)
• Forward Resolution: Confirmed (1 hostname)
• HTTP Services: None detected (Firewalled / No Services)

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## THREAT ASSESSMENT

Risk Metrics

• Overall Risk Score: 40 (Moderate Risk)
• Operator Score: 0.2174 (Minimal threat operator activity)
• Abuse Confidence Score: Not applicable (no abuse indicators)
• Blacklist Status: 0 blacklist hits

Threat Indicators

• Known Attacker: False
• Tor Exit Node: False
• Spam Source: False
• Known Campaigns: None detected
• Threat Persistence: 0 days (not persistently malicious)

Control Plane Status

• Route Stability: False (route changes detected)
• Moas Status: False
• DNSSEC: Valid
• DNSBL Listings: 1 out of 8 total lists (minor reputation concern)

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## NEIGHBORHOOD ANALYSIS (54.39.6.0/24)

Subnet Statistics

• Total Siblings: 256 IPs
• Active Siblings: 182 (71% utilization)
• Threat Siblings: 171 (66% of active IPs show threat indicators)
• Abuse Density: 0.668 (High abuse classification)
• Subnet Risk Classification: HIGH_ABUSE

Risk Distribution

• High Risk: 0 IPs
• Medium Risk: 52 IPs
• Low Risk: 48 IPs

Neighborhood Intelligence

The subnet demonstrates elevated abuse density typical of OVH shared hosting environments. Individual IPs within the /24 block show risk scores ranging from 25-50, with 171 IPs flagged as threat siblings. This suggests the subnet serves mixed legitimate and potentially compromised hosts.

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## OBSERVATION HISTORY

Signal Timeline (24 Total Observations)

• Most Recent: 2026-06-28T00:15:24

- Domain resolution: ahrefs.net (0.80 confidence)

- Operator score: Minimal (0.2174)

• Previous Observation: 2026-06-19T22:10:20

- Subnet abuse density: 0.668 (high_abuse classification)

- Inherited risk: 26

Temporal Analysis

• Ownership Changes: 0 (stable ownership)
• Threat Observation Count: 1
• Is Persistently Malicious: False

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## RELATIONSHIP GRAPH

• Primary Network: OVH-CUST-281059680 (54 occurrences)
• Network Type: Same Network (OVH customer block)
• Associated Domains: ahrefs.net
• No external organizational relationships detected

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## RECOMMENDED ACTIONS

Firewall Rules (Block Recommended)

While the IP shows no active services, the neighborhood-level abuse density warrants blocking:

```bash

# iptables

iptables -A INPUT -s 54.39.6.109 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.6.109 drop

# nginx

deny 54.39.6.109;

# pfSense

54.39.6.109/32

# Cloudflare WAF

Expression: ip.src eq 54.39.6.109

Action: Block

# AWS WAF

Addresses: ["54.39.6.109/32"]

Description: IPDebrief risk 40

```

SOC Recommendations

1. Monitor, Don't Block Aggressively: The IP is associated with legitimate ahrefs.net infrastructure. Consider whitelisting if outbound traffic from this IP is observed.

2. Block at Subnet Level: The high abuse density (0.668) and 171 threat siblings suggest blocking the entire /24 may be warranted if your organization cannot tolerate risk from shared hosting environments.

3. Investigate Outbound Traffic: If this IP initiates connections to your infrastructure, investigate for potential lateral movement or compromised internal assets.

4. Contextual Decision: Weigh the 40 risk score against business requirements. Low-risk false positive risk exists given the legitimate domain association.

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## CONCLUSION

IP 54.39.6.109 represents OVH CloudCompute infrastructure hosting ahrefs.net services in Canada. While individual threat indicators are absent, the subnet-level abuse density (0.668) and high threat sibling count (171) indicate elevated neighborhood risk. The IP is currently firewalled with no active services. SOC teams should balance the legitimate domain association against the subnet's abuse profile when determining blocking strategy.

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*Generated by IPDebrief Intelligence Platform*

*Data sourced from IPDebrief threat intelligence database*

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.