Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d3f22125d49e19…

MALICIOUS

PDF

73.2 KB Created: 2020-08-11 00:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d20f762decdc7f0f08014f47a414ff8b SHA-1: 00e914e1cef9dddb3be15f5f0730456e7b0e9411 SHA-256: 91d3f22125d49e19e06dc8beb42abcbea6f10bc833b7fcae51fc29c156571f01
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate downloads, but they redirect to a malicious domain identified as a redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a pattern of link farming and redirection to malicious infrastructure. The embedded URL points to a known malicious redirector, suggesting the document's primary purpose is to lead users to a compromised site.

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=hamartiology+the+study+of+sin+pdf In PDF document text
    • http://neguzozal.flatheadlakemassage18.com/uploads/1/3/1/3/131380213/wuzapemilo_gavewimiwetum.pdfIn PDF document text
    • http://situro.cherylmccallister.com/uploads/1/3/1/4/131452958/metovegitev.pdfIn PDF document text
    • http://files.matthewlundyportfolio.com/uploads/1/3/1/8/131856186/momadom.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/1/0431/6574/5309/files/electronics_projects.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7685/1614/files/captain_marvel_comic_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7328/4769/files/binutok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/acid_fast_staining_technique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/71059604356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/dagoliwufufipamanisewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/23559587776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/alzheimer_e_parkinson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/29883482576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/xufedetufawofotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.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 2

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_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 5516 bytes
SHA-256: 0bfd8623fd5c261fe4349af13e6942f0414a82e27de0fdf58646a2702465d0cc
font_01_sfnt_off0000f22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 11008 bytes
SHA-256: 957b5d7326b8bcbbc38c723fdd9194c09301fe9f89e04ab06da283649d2f1684

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