Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7687bf1ac2fa82…

MALICIOUS

PDF

39.6 KB Created: 2020-08-04 05:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff9fb7227f09b7c7f7625469315ec16e SHA-1: 554996dc0e7e891fb4f73891e7c858f7ae2bc705 SHA-256: 6c7687bf1ac2fa8223cd5b9b9243f738cbde809592f621a030412982ef75cdb1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users with SEO-optimized titles. The ML classifier strongly indicated maliciousness, and the presence of multiple PDF link farm heuristics confirms a pattern of malicious redirection.

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.cc/pify?keyword=first+law+of+thermodynamics+example+pdf In PDF document text
    • http://files.karenhartman.org/uploads/1/3/1/3/131383398/jizofe.pdfIn PDF document text
    • http://files.colburnart.ca/uploads/1/3/2/6/132695416/7647794d5762.pdfIn PDF document text
    • http://todot.theequineapproach.com/uploads/1/3/1/3/131379732/fagojukoxul.pdfIn PDF document text
    • http://files.benjaminrmark.com/uploads/1/3/1/3/131379246/midita_mexerubapijato_ruwidizopa.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/1/0433/8227/6257/files/o_mio_babbino_caro_soprano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/sosedagididupuwevewupazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/19161220344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/natewen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/xugopiretatine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/luxaxobiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/adding_fractions_with_like_denominators_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9390/7869/files/dizijetidofup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/tetogoxaguxuvakibugamez.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 6

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_off00005da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 5612 bytes
SHA-256: c7c9e18446ace479859451b754c2c020cca253fe66b45eb907a94129304e6fdb
font_01_sfnt_off000070af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 9700 bytes
SHA-256: 0c25e34cf234554ff4e6c04864b14504e0c03ec6544ec17ac9b4003168241431

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