Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c8935d02dc3d25…

MALICIOUS

PDF

51.1 KB Created: 2020-08-07 04:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fcaa57011bf5745cad8b17daca4e41d SHA-1: ed72db19b07c33d9f0db4b21914763b2a81b4060 SHA-256: c4c8935d02dc3d258617fd12ac7519a4549728b3a178c45fc5535b5e27316b90
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector. The primary malicious URL is 'https://ttraff.cc/pify?keyword=definition+of+validity+in+research+pdf', which is designed to lure users into clicking by disguising the link as research material. The PDF also contains numerous other links to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector and link farm strongly suggests a phishing or scam attempt.

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=definition+of+validity+in+research+pdf In PDF document text
    • http://files.petrabrown.co.uk/uploads/1/3/2/6/132681409/ketevenebijuz.pdfIn PDF document text
    • http://files.calvarychapelwesttexas.com/uploads/1/3/1/4/131438216/08a97d87f3d68.pdfIn PDF document text
    • http://files.iamproductionstt.com/uploads/1/3/2/7/132740723/bakolada_semibap_zuxorole.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/1/0432/2630/0575/files/loveseletatinevek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/16376464333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/56323220429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/13643047491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/the_sims_deluxe_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/94430849029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/65118831187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/64932187596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.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_off00008a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1D 5404 bytes
SHA-256: 4d1258e6e106834d7244534a39cc238b06be719f897ebe9b1f1f6558814ed73f
font_01_sfnt_off00009c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C93 10072 bytes
SHA-256: 5beaa43076b3c2e765eb0319eebe5e5a0d55a9764f5a75bf57a395975417a4e9

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