Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cacaeea50b30462…

MALICIOUS

PDF

16.0 KB Created: 2020-11-09 08:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b235da26083d7e9353d55e67ff892209 SHA-1: abf2e414eaacf5e5542de78faed7f7deea68261f SHA-256: 6cacaeea50b304627e16762d13089b14a1da1696eaebf2f118710a6884041326
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a mass external link farm, with many URLs pointing to other PDFs hosted on various platforms. The primary lure URL, 'https://trafffe.ru/123?keyword=recipe+abbreviations+printable+worksheet', appears to be an SEO redirector designed to phish for downloads. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffe.ru/123?keyword=recipe+abbreviations+printable+worksheet PDF link annotation
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/8b8e08dcb70e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fa8deefdafbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478667/normal_5fa625d38165c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f8f64cc66a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f87d448947fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_5f9798d589b96.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/luwedopib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5fa490d6c32bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_5f987f3924f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5f95d721db382.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/caballo_de_troya_libro_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/sniper_3d_hack.pdfIn PDF document text

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