54.39.6.243📋 Copy

# IP INTELLIGENCE BRIEFING

Target: 54.39.6.243/32

Date: Analysis performed on observed data

Risk Classification: MODERATE RISK

---

## EXECUTIVE SUMMARY

IP address 54.39.6.243 is a hosting infrastructure endpoint belonging to OVH (ASN 16276) under organization Dmytro, Ahrefs Pte Ltd. The IP presents a moderate risk score of 40 with no active threat indicators. Geolocation data indicates Beaucharnois, QC, Canada, though RTT measurements suggest potential geolocation inaccuracies. The /24 subnet demonstrates elevated abuse density (0.6836) with 175 threat-sibling addresses detected.

---

## PROFILE ANALYSIS

Ownership & Infrastructure:

• Provider: OVH (ASN 16276)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.6.0/24
• Network Role: Hosting (firewalled/no services detected)
• Cloud Classification: Hosting infrastructure

DNS & Resolution:

• PTR Hostname: proxy-ca001-san243.ahrefs.net
• Forward Resolution: proxy-ca001-san243.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution Status: Unconfirmed (forwardConfirmed: false)

Geolocation:

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beaucharnois
• RTT Anomaly: 28ms observed vs. 112.6ms minimum possible for 5,629km distance — geolocation data flagged as implausible

---

## THREAT ASSESSMENT

Current Risk Indicators:

• Risk Score: 40/100 (Moderate)
• Abuse Confidence Score: Not calculated
• Blacklist Count: 0
• DNSBL Listings: 1/8 total lists
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No

Threat Persistence:

• Threat Observation Count: 0
• Threat Persistence Days: 0
• Persistently Malicious: No

---

## SUBNET NEIGHBORHOOD ANALYSIS

Scope: 54.39.6.0/24

Abuse Metrics:

• Abuse Density: 0.6836 (high_abuse classification)
• Inherited Risk Score: 27
• Total Siblings: 256
• Active Siblings: 206
• Threat Siblings: 175

Risk Distribution Among Subnet:

• High Risk: 0
• Medium Risk: 29
• Low Risk: 71

Sample Neighbor Risk Scores:

• 54.39.6.0: 40 (moderate)
• 54.39.6.1: 25 (low-medium)
• 54.39.6.2: 25 (low-medium)
• 54.39.6.3: 25 (low-medium)
• 54.39.6.4: 25 (low-medium)

---

## OBSERVATION HISTORY

Total Observations: 25 signals

Recent Signal Timeline:

• 2026-06-28 23:04:37 — DNS resolution to ahrefs.net (confidence: 0.80)
• 2026-06-28 23:04:29 — Cloud infrastructure classification, OVH provider (confidence: 0.90)
• 2026-06-20 21:00:00 — OVH hosting classification (confidence: 0.85)
• 2026-06-20 20:57:37 — Geolocation Canada, QC (confidence: 0.18)
• 2026-06-20 20:56:51 — Subnet abuse density 0.6836, high_abuse classification (confidence: 0.75)

Temporal Analysis:

• Ownership changes: 0
• Average ownership days: Not available
• Threat persistence: None observed

---

## RELATIONSHIP GRAPH

Total Relationships: 55

Primary Relationships:

• Same Network: OVH-CUST-281059680 (50+ occurrences)

No external relationships to distinct hostnames, organizations, or certificates detected beyond network-level associations.

---

## RECOMMENDED ACTIONS

Immediate Mitigation Options:

1. iptables:

```

iptables -A INPUT -s 54.39.6.243 -j DROP

```

2. nftables:

```

nft add rule inet filter input ip saddr 54.39.6.243 drop

```

3. nginx:

```

deny 54.39.6.243;

```

4. pfSense:

```

54.39.6.243/32

```

5. Cloudflare WAF:

```json

{

"description": "Block 54.39.6.243 — IPDebrief risk score 40",

"action": "block",

"filter": {"expression": "ip.src eq 54.39.6.243"}

}

```

6. AWS WAF:

```json

{

"Addresses": ["54.39.6.243/32"],

"Description": "IPDebrief risk 40"

}

```

Action Priority: LOW-MEDIUM

Rationale: The IP presents moderate risk without active threat indicators. Subnet-level abuse density is elevated (0.6836), but the specific IP shows no direct malicious activity. Consider blocking at the subnet level (54.39.6.0/24) if traffic volume warrants it.

---

## INTELLIGENCE CONCLUSIONS

1. 54.39.6.243 is an OVH-hosted endpoint with legitimate DNS resolution to ahrefs.net infrastructure

. No active attack campaigns or known malicious

. No active attack campaigns or known malicious campaigns correlated with this IP. The subnet exhibits elevated abuse density (0.6836) with 175 threat-sibling addresses, suggesting the hosting environment warrants monitoring rather than immediate blocking.

2. Subnet-level correlation indicates 54.39.6.0/24 contains 175 threat-sibling addresses. Consider evaluating adjacent IPs if traffic patterns indicate coordinated activity.

3. Geolocation verification shows RTT anomalies (28ms observed vs. 112.6ms minimum for 5,629km distance). Do not rely solely on reported location for forensic attribution.

4. DNSBL status shows 1 listing out of 8 total lists. Investigate listing source if false positives are suspected.

5. Forward resolution confirmation remains unverified. Recommend DNS verification before associating with known services.

6. Service fingerprinting shows no open ports or TLS certificates. Passive traffic monitoring may reveal actual service utilization.

Final Recommendation: Monitor rather than block. The IP lacks direct threat indicators despite subnet-level abuse density. Implement logging and traffic analysis to detect any behavioral changes.

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