Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd918fc3724f1a2…

MALICIOUS

PDF

55.1 KB Created: 2020-12-17 11:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 41b4af757dffa5d4b75170a282aef85f SHA-1: 68123791722a6b85dc94e90bf01563693a746fde SHA-256: 4fd918fc3724f1a24f1285be65f1fa3f98051ba450f5da1ad465c838f15051a0
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a high-severity rule indicating it's an SEO redirector for phishing. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of a redirector suggest an intent to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9815

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=autos+direct+des+moines+iowa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f963455bb495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f954f6dbe803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fbf5cab1d225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f94f07632fac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5fa60ad748ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f9ef6366c84e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5fae87df4b2e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f909e0b5848e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37af1e8b-5407-42d9-a90d-821cddef7879/bottines_plateforme_cuir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472c0918-98a6-4dc8-84a8-26e45d7e33b2/yuan-ti_pureblood_5e_book.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB0 5132 bytes
SHA-256: 6dafcfcf08544b493d44ca0f45a076c4b1bf574bbfa929861e82299e1c59db7a

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