Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa549e8fd5ec755…

MALICIOUS

PDF

46.9 KB Created: 2020-11-25 04:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad081cecf3b5969ab9c0d1c822ba9f86 SHA-1: 5e9e58f4562aa0cc9142f0813125d965fe0e6c9b SHA-256: baa549e8fd5ec755b57c713ee61357407738158d9720c7e88700e649d78c9ad7
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a phishing lure, employing an image-only design to conceal a malicious redirect link. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the embedded URL, https://cctraff.ru/123?utm_term=super+metroid+enemy+sprites, leads to known malicious infrastructure. The document's structure and the presence of numerous external links suggest an attempt to leverage SEO techniques for broader distribution, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5928

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 46 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?utm_term=super+metroid+enemy+sprites
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f9b80c33a1c0.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fad400f9f38f.pdf
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f87a41f32359.pdf
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5fa63e1311733.pdf
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fabaebd943f6.pdf
    • https://nikevafojo.weebly.com/uploads/1/3/4/6/134680040/5317322.pdf
    • https://cdn-cms.f-static.net/uploads/4412181/normal_5f94f783b9f71.pdf
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f9f00eda0df7.pdf
    • https://uploads.strikinglycdn.com/files/c68dfae7-9e2e-470b-b383-760f52099bca/48122088033.pdf
    • https://s3.amazonaws.com/semuxemakaw/nasogastric_tube_insertion_guidelines_nice.pdf

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