54.39.136.119📋 Copy

# INTELLIGENCE BRIEFING: 54.39.136.119/32

Classification: MODERATE RISK

Date: Current

Analyst: IPDebrief Intelligence

---

## EXECUTIVE SUMMARY

Target IP 54.39.136.119 is a cloud-hosted infrastructure node operated by OVH in Canada. The IP is associated with Ahrefs domain infrastructure and resolves to proxy hostname proxy-ca002-san119.ahrefs.net. Risk score of 40 indicates moderate risk level. The /24 subnet demonstrates high abuse density (0.6641) with 66.41% abuse classification, suggesting this IP block contains a significant number of compromised or misconfigured endpoints.

---

## RISK PROFILE

---

## INFRASTRUCTURE ANALYSIS

Network Classification:

• Infrastructure Type: CloudCompute
• Cloud Provider: OVH
• Connection Type: Cloud-hosted
• Hosting Status: Active
• CDN/VPN/Proxy: Not detected
• Anycast: Not detected

DNS Resolution:

• PTR Hostname: proxy-ca002-san119.ahrefs.net
• Forward Resolution: proxy-ca002-san119.ahrefs.net
• Domain Association: ahrefs.net
• DNSSEC: Valid
• DNSBL Listed: 1 of 8 total lists

Service Status:

• Open Ports: None detected
• HTTP/TLS Services: None detected
• Server Banner: None
• Service Purpose: Firewalled / No Services

---

## GEOLOCATION VALIDATION

Reported Location: Canada, Quebec, Beauharnois

Geolocation Confidence: Low (geoPlausible: false)

Distance Validation: 5,628.6 km from probe

RTT Validation: 32ms observed vs 112.6ms minimum expected for distance

Verdict: Geographic data shows significant validation anomaly. RTT measurements indicate the IP may be geographically misattributed or located in a different region than reported.

---

## THREAT INDICATORS

Assessment: No direct threat indicators observed. IP does not appear in known threat feeds or campaign databases.

---

## NEIGHBORHOOD ANALYSIS

Subnet: 54.39.136.0/24

Classification: HIGH ABUSE

Abuse Density: 0.6641 (66.41%)

Total Siblings: 256

Active Siblings: 185

Threat Siblings: 170

Risk Distribution in /24:

• High Risk: 0 IPs
• Medium Risk: 100 IPs
• Low Risk: 0 IPs

Assessment: The /24 subnet shows significant abuse density with 66.41% of addresses flagged as problematic. This IP is embedded in a high-risk subnet environment, suggesting potential for lateral threat activity or shared infrastructure risks.

---

## OBSERVATION HISTORY

Analysis Period: 2026-06-13 to 2026-06-21 (8 observations)

Key Timeline Events:

• 2026-06-13: Cloud infrastructure classification confirmed (OVH, CloudCompute)
• 2026-06-13: Moderate risk profile established
• 2026-06-16: Subnet abuse density increased to 0.6797
• 2026-06-16: Inherited risk score rose to 27
• 2026-06-21: Abuse density stabilized at 0.6641
• 2026-06-21: Inherited risk score decreased to 26

Persistence Analysis:

• Ownership Changes: 0
• Threat Persistence: 0 days
• Threat Observation Count: 0
• Persistently Malicious: No

Assessment: IP demonstrates stable ownership with consistent risk profile over the observation period. No evidence of malicious activity emergence or degradation.

---

## RELATIONSHIP GRAPH

Connected Entities (15 relationships):

• Same Network: OVH-CUST-281059681 (7 instances)
• DNS Association: proxy-ca002-san119.ahrefs.net (8 instances)

Relationship Assessment: IP is tightly coupled with OVH cloud infrastructure and Ahrefs domain resolution. No external organizational relationships detected beyond provider and DNS associations.

---

## RECOMMENDED SECURITY ACTIONS

Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 54.39.136.119 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.136.119 drop

# nginx

deny 54.39.136.119;

```

WAF/Cloud Security:

```json

# Cloudflare WAF

{

"description": "Block 54.39.136.119 — IPDebrief risk score 40",

"action": "block",

"filter": {

"expression": "ip.src eq 54.39.136.119"

}

}

# AWS WAF

{

"Addresses": ["54.39.136.119/32"],

"Description": "IPDebrief risk 40"

}

```

---

## INTELLIGENCE JUDGMENT

Threat Level: MODERATE

Action Required: CONSIDER BLOCKING

Rationale:

1. IP exhibits moderate risk score (40) with no direct threat indicators

2. Embedded in high-abuse-density subnet (66.41%)

3. Cloud-hosted infrastructure with no detected services

4. Ahrefs domain association suggests legitimate web infrastructure

5. No evidence of active malicious campaigns or campaigns correlations

Recommendation: Monitor traffic from this IP. Given the high abuse density in the /24 subnet and lack of direct threat indicators, a block may be overly aggressive. Recommend traffic monitoring and allowlisting if business relationships with Ahrefs exist. If blocking is required, implement with traffic logging for forensic analysis.

Confidence Level: HIGH (based on comprehensive profile data)

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