Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14872783e1b0043…

MALICIOUS

PDF

26.0 KB Created: 2020-11-03 08:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4391ae6b6795fa406e4a374bc94ab40f SHA-1: 0d40d30e81d44c8ebcf191a82ac29ef6151e5923 SHA-256: e14872783e1b0043a856b768d41a2b473aa67bf871ae69f13bb99bfc645f899d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://cctraff.ru/aws?keyword=change+password+windows+2013, is flagged as a malicious redirector. The document body also contains text related to changing passwords, reinforcing the lure. The presence of numerous external PDF links suggests a link farm used for SEO poisoning or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 3

  • 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.
  • 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/aws?keyword=change+password+windows+2013
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8a7b184ee71.pdf
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f9aba4595d65.pdf
    • https://dabatipiregu.weebly.com/uploads/1/3/4/4/134435287/5460521.pdf
    • https://cdn-cms.f-static.net/uploads/4423155/normal_5f9a68de7c7c9.pdf
    • https://uploads.strikinglycdn.com/files/00f51a4a-020b-4d1c-b8b6-44eab83eaf4d/sakovejobubukakukugerujad.pdf
    • https://uploads.strikinglycdn.com/files/56781a7c-5222-4fd1-aa92-eb29b7e8d1a0/galug.pdf
    • https://uploads.strikinglycdn.com/files/1762d8e4-a41e-468f-a99f-688d1a984e76/majutaririlukar.pdf
    • https://uploads.strikinglycdn.com/files/db7df38e-21ef-4d59-b8cd-011d5792570d/63745653858.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/graco_car_seat_cover.pdf
    • https://cdn.shopify.com/s/files/1/0494/5736/5159/files/4150016719.pdf

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