54.39.89.98📋 Copy

# INTELLIGENCE BRIEFING: 54.39.89.98/32

Classification: Moderate Risk | Date: Current | Source: IPDebrief Intelligence Platform

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## EXECUTIVE SUMMARY

IP 54.39.89.98 is a cloud computing infrastructure address operated by OVH (ASN 16276) under Ahrefs Pte Ltd. The IP presents a moderate risk profile with a risk score of 40 and is located in Beauharnois, Quebec, Canada. While the IP resolves to a legitimate Ahrefs domain (proxy-ca012-san98.ahrefs.net), the subnet exhibits high abuse density, warranting defensive monitoring.

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## NETWORK OWNERSHIP & GEOLOCATION

• Organization: Dmytro, Ahrefs Pte Ltd
• ASN: 16276 (OVH)
• CIDR Block: 54.39.89.0/24
• Geolocation: Beauharnois, QC, Canada (CA)
• Infrastructure Type: CloudCompute / Hosting
• Connection Type: Firewall / No services exposed

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## THREAT ASSESSMENT

Threat Indicators: No active threat indicators detected. No known attack patterns or campaign associations.

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## NEIGHBORHOOD ANALYSIS (54.39.89.0/24)

The /24 subnet exhibits elevated risk characteristics:

• Abuse Density: 0.8125 (High Abuse Classification)
• Total Subnet Siblings: 256
• Active Siblings: 178
• Threat Siblings: 208
• Inherited Risk Score: 32
• Risk Distribution: 100 medium-risk neighbors, 0 high/low risk

Assessment: The subnet demonstrates concentrated activity patterns consistent with legitimate cloud hosting but requires monitoring due to elevated abuse density.

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## DNS & SERVICE ANALYSIS

• PTR Hostname: proxy-ca012-san98.ahrefs.net
• Forward Resolution: proxy-ca012-san98.ahrefs.net
• Domain: ahrefs.net
• Open Ports: None detected
• TLS Certificate: None
• HTTP Banner: None
• SPF/DMARC Records: Not configured

Assessment: DNS records indicate legitimate proxy infrastructure for Ahrefs, but lack of email authentication records (SPF/DMARC) is noted.

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## OBSERVATION HISTORY

Analysis of 20 historical observations indicates:

• Threat Persistence: 0 days
• Ownership Changes: 0
• Observation Count: 1 threat observation
• Persistently Malicious: No
• Recent Signal Types: Network classification, geolocation, subnet analysis, routing, and reputation assessments with confidence scores ranging from 0.18 to 0.85

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## RELATIONSHIP GRAPH

39 relationships identified, primarily:

• Multiple same-network associations to OVH-CUST-281059691
• Control plane data linking to origin ASN 16276
• BGP prefix: 54.39.0.0/16

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## RECOMMENDED ACTIONS

Based on risk profile and threat indicators, the following defensive measures are recommended:

Firewall Blocking:

• iptables: `iptables -A INPUT -s 54.39.89.98 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 54.39.89.98 drop`
• NGINX: `deny 54.39.89.98;`
• pfSense: `54.39.89.98/32`
• Cloudflare WAF: Block with expression `ip.src eq 54.39.89.98`
• AWS WAF: Add address `54.39.89.98/32` to rule

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## ANALYST NOTES

1. Risk Context: The moderate risk score (40) combined with high-abuse subnet classification suggests routine monitoring rather than immediate blocking.

2. Legitimate Use Case: DNS resolution to ahrefs.net indicates legitimate SEO analytics infrastructure. Corporate association with Ahrefs (established SEO platform) suggests authorized use.

3. Subnet Risk: The elevated abuse density (0.8125) in the /24 subnet is notable and may indicate shared hosting infrastructure where multiple tenants are hosted.

4. Action Priority: Consider blocking if the IP appears in threat intelligence feeds, exhibits scanning behavior, or is associated with confirmed malicious campaigns.

5. Ongoing Monitoring: Recommended due to neighborhood abuse characteristics. Monitor for changes in DNS configuration, open ports, or threat indicator emergence.

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End of Briefing

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