Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3bfed64af2e4a2…

MALICIOUS

PDF

48.6 KB Created: 2020-08-05 12:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b26254b5c7ef03c2dbbf48240f612d6d SHA-1: e68e3201c8608e9e49dbfae34e1d4f2295ff1a55 SHA-256: 3f3bfed64af2e4a28bcd7a6c7a42428ed7883b0e5d57de8c45de5fa8c4708fb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=penetrating+keratoplasty+pdf In PDF document text
    • http://files.geofuljazz.com/uploads/1/3/1/3/131380741/2893472.pdfIn PDF document text
    • http://pejakobi.iberian-home.com/uploads/1/3/2/7/132710797/abb981d82e3be1.pdfIn PDF document text
    • http://files.polbacquet-photo.com/uploads/1/3/1/6/131636819/tevexedi_nurof.pdfIn PDF document text
    • http://files.rootzwestbend.com/uploads/1/3/0/7/130740112/1ce6f04eb.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/kupesuditijativerawepafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/sims_4_conflict_detector.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/58180081424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23083433767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/57591074530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/wuvoxuxodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/tunigugowafinasidojezule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/llama_1911_9mm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/xedun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/13033483426.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 7

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_off00008053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8053 5376 bytes
SHA-256: 8afae601b8679d53b58e5923edc0a2c0e3e383cdb15bb6e6b57c6f636676e252
font_01_sfnt_off000092bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 10140 bytes
SHA-256: f3dfc2d5a4dd688d1cee624db2dae6911e8c8754342ba35eb39b0964d21da49f

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