54.39.203.62📋 Copy

# THREAT INTELLIGENCE BRIEFING

Target: 54.39.203.62/32

Date: 2026-06-15

Classification: Moderate Risk / High-Abuse Infrastructure

---

## EXECUTIVE SUMMARY

IP 54.39.203.62 is a cloud hosting endpoint operating within OVH infrastructure. The address resolves to a DNS hostname associated with Ahrefs (proxy-ca008-san62.ahrefs.net), indicating potential legitimate SEO/marketing tool usage. However, the subnet demonstrates elevated abuse characteristics with 64.84% abuse density. No active threat indicators were identified, but the high-abuse neighborhood warrants defensive monitoring.

---

## INFRASTRUCTURE PROFILE

Network Ownership:

• ASN: 16276 (OVH SAS)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Name: OVH-CUST-281059687
• CIDR Block: 54.39.203.0/24
• RIR: ARIN

Geolocation:

• Country: Canada (CA)
• Region: Québec (QC)
• City: Beauharnois
• Note: Geographic validation inconclusive—RTT measurements indicate 29ms latency versus 112.6ms minimum expected for 5,629km distance from probe location.

Network Classification:

• Infrastructure Type: CloudCompute
• Service Purpose: Firewalled / No Services
• Open Ports: None detected
• TLS Certificates: None detected

---

## NEIGHBORHOOD ANALYSIS

Subnet Risk Assessment (54.39.203.0/24):

• Abuse Density: 0.6484 (High)
• Inherited Risk Score: 25
• Total Siblings: 256
• Active Siblings: 209
• Threat-Sibling IPs: 166

Risk Distribution:

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

Key Finding: The /24 subnet exhibits concentrated abuse activity with approximately 65% of sibling IPs classified as threat siblings. This indicates compromised or malicious co-tenancy within the OVH infrastructure.

---

## OBSERVATION HISTORY

Signal Count: 25 observations (2026-06-15)

Recent Signals:

1. Subnet Classification (21:02 UTC): High-abuse classification with 0.6484 abuse density, confidence 0.75

2. Geolocation Validation (20:58 UTC): RTT violation detected—29ms measured vs. 112.6ms minimum expected for claimed distance, confidence 0.30

3. Operator Score (20:56 UTC): 0.4783 (Basic), confidence 0.85

4. Geolocation (20:54 UTC): ASN AS16276 OVH SAS, Beauharnois, QC, confidence 0.50

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence: 0 days
• Threat Observation Count: 0
• Persistently Malicious: False

---

## RELATIONSHIP GRAPH

Primary Relationships (44 total):

• All relationships mapped to network entity: OVH-CUST-281059687
• No external network associations
• No certificate relationships
• No campaign correlations

---

## THREAT INDICATORS

Direct Indicators:

• Blacklist Count: 0
• DNSBL Listed: 2 of 8 lists
• Known Campaigns: None
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No

Threat Feeds: Empty

---

## RECOMMENDED ACTIONS

Defense Posture:

1. Monitor Traffic Patterns: Despite moderate individual risk score, the high-abuse subnet warrants traffic analysis for anomalies

2. Implement Rate Limiting: Apply connection rate limits to prevent exploitation of shared infrastructure

3. DNS Validation: Verify hostname (proxy-ca008-san62.ahrefs.net) resolves to expected infrastructure before allowing traffic

4. Geo-Filtering: Consider geographic restrictions if legitimate business requires specific Canadian endpoint access

Firewall Rule (Recommended):

```

# Block or restrict based on subnet-level abuse

ip addr 54.39.203.0/24

```

---

## ANALYST NOTES

This IP represents legitimate cloud infrastructure with Ahrefs branding but operates within a high-abuse OVH subnet. The 166 threat siblings in the /24 indicate significant co-tenancy with compromised hosts. While this specific IP shows no active threat indicators, the neighborhood risk suggests implementing defensive controls at the subnet level is prudent. Geographic inconsistencies require validation before trusting location-based security policies.

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