5.39.109.170📋 Copy

# IP INTELLIGENCE BRIEFING: 5.39.109.170

Classification: Moderate Risk / Hosting Infrastructure

Date: Current

Analyst: IPDebrief Intelligence System

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## EXECUTIVE SUMMARY

IP address 5.39.109.170 operates within OVH hosting infrastructure (ASN 16276) with a risk score of 40/100. The IP resolves to aresolvable hostname (proxy-fr009-san170.ahrefs.net) within the ahrefs.net domain. No active threat indicators, known campaigns, or malicious reputation signals detected. However, the /24 subnet demonstrates elevated abuse activity (75% abuse density, 18 threat siblings), warranting defensive monitoring.

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## INFRASTRUCTURE PROFILE

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## THREAT ASSESSMENT

Current Threat Indicators

• Abuse Confidence Score: None reported
• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No
• Blacklist Count: 0
• DNSBL Listed: 1 of 8 lists

Risk Factors

• Subnet classified as high_abuse with 75% abuse density
• 18 of 24 sibling IPs show threat activity
• Inherited subnet risk score: 30/100
• Operator score: 0.2174 (minimal)

---

## OBSERVATION HISTORY

Recent signals (June 2026) confirm consistent hosting/cloud infrastructure classification. Key historical observations:

• June 26, 2026: Cloud infrastructure (OVH provider) confirmed
• June 19, 2026: High-abuse subnet classification recorded; operator score 0.2174
• Ownership changes: 0 (stable)
• Threat persistence: 0 days (no persistent malicious activity)

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## NEIGHBORHOOD ANALYSIS

Subnet 5.39.109.0/24 contains 24 total IPs with 14 active. Risk distribution:

• High Risk: 0 IPs
• Medium Risk: 10 IPs
• Low Risk: 13 IPs

Notable neighboring IPs include:

• 5.39.109.160, .162, .168, .171, .176, .177, .180, .187, .189, .190 (risk score 40)
• 5.39.109.163, .166, .167, .169, .172, .173, .175, .178, .179, .182, .185, .186, .191 (risk score 25)

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## RECOMMENDED ACTIONS

Defensive Blocking (Firewall Rules)

iptables:

```bash

iptables -A INPUT -s 5.39.109.170 -j DROP

```

nftables:

```bash

nft add rule inet filter input ip saddr 5.39.109.170 drop

```

nginx:

```nginx

deny 5.39.109.170;

```

Cloudflare WAF:

```json

{

"description": "Block 5.39.109.170 — IPDebrief risk score 40",

"action": "block",

"filter": {"expression": "ip.src eq 5.39.109.170"}

}

```

AWS WAF:

```json

{

"Addresses": ["5.39.109.170/32"],

"Description": "IPDebrief risk 40"

}

```

---

## INTELLIGENCE NOTES

1. Legitimate vs. Abusive Use: While the IP resolves to ahrefs.net (legitimate SEO analytics provider), the hosting environment and subnet-level abuse metrics suggest potential misuse of shared infrastructure.

2. No Active Malware: No threat feeds, campaigns, or known attacker indicators associated with this IP.

3. Subnet Context: The high abuse density (0.75) in the /24 subnet indicates this is a commonly exploited hosting tier. Blocking the specific IP may provide limited protection against lateral movement within the same subnet.

4. Recommendation: Monitor for abuse patterns; consider blocking entire /24 subnet if threat persistence increases. Maintain baseline traffic monitoring for legitimate ahrefs.net operations.

---

END OF BRIEFING

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