Malicious PDF — malware analysis report

Static analysis result for SHA-256 758a392bced49d06…

MALICIOUS

PDF

26.0 KB Created: 2020-11-07 20:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1d75bea0ba31040ae764ce84dc049fe5 SHA-1: 03608ba49b117ebb0c61ab760e92bd982e0bc0aa SHA-256: 758a392bced49d0692bf5b0cfad2fa517d9cf31965b319080c373f71a275c6f7
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is malicious and uses an SEO redirector for a "free-download phishing" lure. The document body, though heavily obfuscated, contains the URL https://trafftec.ru/aws?keyword=part+of+a+whole+as+a+percent+worksheet, which is also flagged as an external URI. This suggests the document is designed to lead the user to a malicious site under the guise of providing a worksheet.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 3

  • 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/aws?keyword=part+of+a+whole+as+a+percent+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8a4d1b40157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f95c77b12a25.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/75c617e3-a458-45b1-8d45-773f1b41d6d9/gusose.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/xisivokoduxiwedalekos.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/57647066973.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/unblocked_google_games_tank_trouble.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/ammonia_ph_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/14457034205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe2c8bd-2439-4a60-b485-9e8bfd83eddf/pemuvidemifu.pdfIn PDF document text
    • https://s3.amazonaws.com/xafuluxel/morawavukinerofomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96cf2aa-d199-4e0d-a6c4-bc6b83369019/nofexeranitazexuwi.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_off00005868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5868 5260 bytes
SHA-256: 690d94b7325967d8ce54833b5f7ecf906c9323141d38d7522a52ab8930e07255

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