Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bd3811cd827efa…

MALICIOUS

PDF

35.2 KB Created: 2020-08-09 04:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a83b9b03c32facba3346a9a3d21f67f SHA-1: d0418ffe13288ec1fa46bc4dff03fb0c1616ca77 SHA-256: 74bd3811cd827efa08d63e0ec64252aafa64228d99c12af0806f70b041f63f3a
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body and embedded links suggest a phishing lure for a book download, likely leading to malware. The ML classifier strongly indicates maliciousness, and the presence of multiple SEO-optimized links further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=capitalismo+e+liberdade+download+pdf In PDF document text
    • http://files.talismanmag.net/uploads/1/3/1/4/131453045/5725287.pdfIn PDF document text
    • http://wojav.crime-fighters.com/uploads/1/3/1/6/131607600/1453613.pdfIn PDF document text
    • http://gezox.poetsinthegarden.com/uploads/1/3/0/9/130969204/37edc008d9a.pdfIn PDF document text
    • http://files.corpsefeed.com/uploads/1/3/0/7/130776075/lewapa-vexezakirefodob-nekanimuve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/buwatodajujibevenope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/wamapavizavopivutitezuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/kevitase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/honeywell_pro_6000_install_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/78915842395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/midapatidiniwowuperolenod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/radubolebevafobeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/callback_function_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/13742698148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/kukusofepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/kurodokorozogivemisov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C21 5324 bytes
SHA-256: 04a3a738448db7dda8a39af5b39cc45b060d179ab2003212f6f3800a8a71a67b
font_01_sfnt_off00005e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 9880 bytes
SHA-256: 5de505c48276b514349e0076322cd5e0640b4c2d0e4f47e5fd70f4781f1fcece

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