Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd70edbe21f73d2d…

MALICIOUS

PDF

24.7 KB Created: 2020-10-28 21:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bdb137bc2d243636d00302261811538 SHA-1: c06cd64c6a667aa237dd7f1d6026e851dfcf040e SHA-256: bd70edbe21f73d2d04ce09eb69e61be64ee4d9c446e00fd6b3465bdd6dcf850f
172 Risk Score

Malware Insights

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

This PDF document employs a screenshot lure, presenting itself as a full-page image to entice users into clicking a link. The embedded link redirects to a known malicious infrastructure at `https://cctraff.ru/strik?keyword=celebrate+recovery+lesson+20+answers`. The document also contains a large number of external PDF links, suggesting a link farm for SEO manipulation or further distribution. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 24 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/strik?keyword=celebrate+recovery+lesson+20+answers
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f98f8d45683d.pdf
    • https://regajuwanuduxis.weebly.com/uploads/1/3/4/3/134319991/xowazonu_wugaxizata_walamukutid.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/6182291.pdf
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/4abb8c2.pdf
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5f9664a74b6ec.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/javapopesi.pdf
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/1d41fbd7b384b93.pdf
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8722621f455.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.pdf
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f896dff73a47.pdf
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/8f4a7d15e9f467.pdf
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/lotubula_govuxoxusuxe.pdf
    • https://cdn.shopify.com/s/files/1/0465/0126/5566/files/jelofuw.pdf
    • https://s3.amazonaws.com/pazerogasarinu/31750070735.pdf
    • https://cdn.shopify.com/s/files/1/0497/3969/4241/files/sukimowumoxuzumepenuf.pdf
    • https://cdn.shopify.com/s/files/1/0499/1074/3208/files/43154011969.pdf
    • https://cdn.shopify.com/s/files/1/0491/6035/6039/files/5807882535.pdf

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