Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d336277d0d4ffa…

MALICIOUS

PDF

49.6 KB Created: 2020-12-22 22:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83b167ba0273181038f21809877c521c SHA-1: 8716154500c5e890fd93f9fb56d456d74bd820ab SHA-256: e0d336277d0d4ffa8fb383c2ee8e74991269327d7731a1b000882bdb1a28a8c8
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and ML classifiers, and heuristics indicate it contains a link farm and redirects to known malicious infrastructure. The embedded URLs, such as 'https://gettraff.ru/aws?utm_term=capitalization+worksheet+for+grade+1+pdf', are likely used to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5414

Heuristics 4

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=capitalization+worksheet+for+grade+1+pdf
    • https://cdn-cms.f-static.net/uploads/4417806/normal_5fa861154549a.pdf
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5fd88fa82b187.pdf
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc81b13e4fc3.pdf
    • https://cdn-cms.f-static.net/uploads/4475847/normal_5fc28d9dc5598.pdf
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/zikavu-vukulafazulet.pdf
    • https://cdn-cms.f-static.net/uploads/4408704/normal_5f9d48373d7fc.pdf
    • https://cdn-cms.f-static.net/uploads/4481663/normal_5fda72973f7cc.pdf
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/nojanuwetutawop_jujuxedutetiro_wufika.pdf
    • https://uploads.strikinglycdn.com/files/e38befea-13e3-43e8-a4d0-5e1f8bc7ebda/jixaxulunewerarini.pdf
    • https://static1.squarespace.com/static/5fdfd9daff074777c9861c88/t/5fe0c17b79c34d2c518681ff/1608565115794/drawable_to_bitmap_android_java.pdf
    • https://uploads.strikinglycdn.com/files/a1dc2354-89d8-44e0-9781-57b6e31006ea/78668589980.pdf

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