54.39.89.85📋 Copy

## IP Intelligence Briefing: 54.39.89.85/32

Classification: Moderate Risk Cloud Infrastructure Node

Date: Current Intelligence Cycle

Status: Active Monitoring Required

Executive Summary

IP 54.39.89.85 operates within OVH cloud infrastructure under the network identifier OVH-CUST-281059691. The IP demonstrates moderate risk characteristics (risk score: 40) with evidence of DNSBL listings and association with a subnet exhibiting high abuse density. The IP resolves to hostname proxy-ca012-san85.ahrefs.net, indicating infrastructure for Ahrefs Pte Ltd.

Technical Profile

Infrastructure Classification:

• Provider: OVH (ASN 16276)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network: 54.39.89.0/24
• Country/Region: Canada (Quebec, Beauharnois)
• Infrastructure Type: Cloud Compute
• BGP Prefix: 54.39.0.0/16

Network Behavior:

• Services: Firewalled / No Services Detected
• Open Ports: None
• DNS PTR: proxy-ca012-san85.ahrefs.net
• Forward Resolution: Verified (ahrefs.net)
• SSL/TLS: No certificates detected

Control Plane Indicators:

• Route Stability: Stable
• DNSSEC: Valid
• DNSBL Listings: 1 of 8 threat feeds
• Operator Score: 0.4783 (Basic)

Neighborhood Analysis

The /24 subnet 54.39.89.0/24 demonstrates elevated abuse characteristics:

• Abuse Density: 0.7578 (High Abuse Classification)
• Active Siblings: 176 of 256 total IPs
• Threat Siblings: 194 IPs flagged as threats
• Subnet Risk: Inherited risk score of 30 from neighborhood context
• Neighbor Risk Distribution: 100 medium-risk IPs, 0 high-risk IPs

Historical Signal Analysis

Observation history indicates 23 signal observations. Key temporal findings include:

• Recent Risk Assessment: Signals observed with confidence levels ranging from 0.19 to 0.85
• Abuse Density Signals: Multiple observations confirmed high_abuse classification with abuse density of 0.7578
• Operator Score Evolution: Initial assessments showed operator score of 0.087, later elevated to 0.4783
• Threat Persistence: No persistent malicious behavior detected (threatPersistenceDays: 0)
• Ownership Changes: Zero ownership changes recorded

Threat Indicators

Active Threats: None currently observed

• Tor Exit Node: False
• Known Attacker: False
• Spam Source: False
• Campaign Associations: None
• Blacklist Count: 0
• Cert Matches: 0
• Banner Matches: 0

SOC Actionable Recommendations

Immediate Actions:

1. Monitor DNS Activity: The IP resolves to a proxy hostname (proxy-ca012-san85.ahrefs.net). Monitor for suspicious DNS queries from internal endpoints.

2. Firewall Rules: Implement rate-limiting for outbound connections to this IP, particularly for DNS and HTTP traffic.

3. Traffic Analysis: Inspect for data exfiltration patterns given the high-abuse neighborhood context.

Long-term Monitoring:

1. Subnet Awareness: Monitor the 54.39.89.0/24 subnet for coordinated activity given 194 flagged threat siblings.

2. DNSBL Updates: Track DNSBL status; currently listed on 1 of 8 threat feeds.

3. Infrastructure Changes: Monitor for any service activation on this cloud-hosted IP.

Threat Context:

This IP operates within a cloud environment with established abuse patterns in the immediate subnet. While no active attacks are currently associated, the high neighborhood abuse density warrants continued monitoring for lateral movement or infrastructure repurposing. The association with Ahrefs infrastructure suggests legitimate use, but the DNSBL listing indicates past problematic behavior or associated infrastructure abuse.

Confidence Level: Moderate (riskScore: 40, operatorScore: 0.4783)

Intelligence Maturity: Operational - suitable for defensive rule generation and monitoring

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