Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76b79668ca9e441…

MALICIOUS

PDF

16.0 KB Created: 2020-10-31 12:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce2eccd3e854dd9d2656589877b6bfd SHA-1: 0597f41871d5f60597814efd6ba483cd8fc75510 SHA-256: f76b79668ca9e4416ee19123e29a0297d29e38455d525902848adebecf7bc217
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious due to its structure as an image-only lure and the presence of a malicious redirector link. The document body contains a URL that likely leads to a phishing or malware distribution site. The heuristic firings indicate a link farm and a redirector, suggesting the primary purpose is to funnel users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 16 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://ttraff.link/123?keyword=clawee+coupon+code+free+coins+2019
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f89492ad87e3.pdf
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8b025a31e71.pdf
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5f9088c3e29f8.pdf
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f9cdf579542d.pdf
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5f91c7abc3bdc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/98968947360.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1911/files/xozafem.pdf
    • https://cdn.shopify.com/s/files/1/0498/5913/3602/files/46943564940.pdf
    • https://cdn.shopify.com/s/files/1/0439/3861/1355/files/telecharger_dictionnaire_des_rimes.pdf
    • https://cdn.shopify.com/s/files/1/0504/8552/6693/files/gipaxatetamizeto.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/20953560680.pdf
    • https://cdn.shopify.com/s/files/1/0503/6064/7832/files/el_boom_latinoamericano_caractersticas.pdf
    • https://cdn.shopify.com/s/files/1/0502/5362/7584/files/t_mobile_zte_hotspot_manual.pdf

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