Malicious PDF — malware analysis report

Static analysis result for SHA-256 62af9cdf641d31b7…

MALICIOUS

PDF

32.6 KB Created: 2020-11-08 00:08:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b84f05fb20f28b9ac6525b5d996ae65 SHA-1: 41997e48d3c043e5d6dd90c651380fa49d577256 SHA-256: 62af9cdf641d31b75d568d3fef2fe7db4127b152a367fe96ccd5edf1c0ca9bdc
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware delivery. It contains a clickable link to 'trafftec.ru' which is suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, suggesting a link farm used for SEO poisoning or distributing further malicious content. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • 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.
  • 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 32 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?keyword=guitar+hero+warriors+of+rock+setlist
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f9eefdf1a7de.pdf
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdf
    • https://uploads.strikinglycdn.com/files/67b6ed9d-49bd-41c7-9386-8aa51d34be98/dasiw.pdf
    • https://s3.amazonaws.com/vavebufevodutob/69654205666.pdf
    • https://uploads.strikinglycdn.com/files/152462ca-cb54-479c-9567-9c8e82cecc57/relub.pdf
    • https://uploads.strikinglycdn.com/files/04ff3949-5ad9-420b-ad12-cb9f532b3f51/suddenlink_channel_guide_college_station_tx.pdf
    • https://s3.amazonaws.com/xurixado/kesig.pdf
    • https://s3.amazonaws.com/jiwisi/pekokaxorufexukuwimenajul.pdf
    • https://wobonil.files.wordpress.com/2020/11/58401365237.pdf
    • https://vulopadur.files.wordpress.com/2020/11/60445860904.pdf
    • https://uploads.strikinglycdn.com/files/4e970fff-ef54-41e7-a96c-6096f53fc898/rexosajapemalup.pdf
    • https://fojewuxekaku.files.wordpress.com/2020/11/27423302807.pdf
    • https://uploads.strikinglycdn.com/files/dc6758d2-1c60-4aa5-b213-3aaa1780051b/fuguziwefadan.pdf

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