Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7df4279c395c422…

MALICIOUS

PDF

39.3 KB Created: 2020-10-02 02:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-28
MD5: 81d2fbcfbfb031407792c0fe57b514ff SHA-1: 2d21ab8a8b454f995cca50c227dee352176a35c9 SHA-256: c7df4279c395c422017f8b057f7f6b3265d5b407b7ddffc62bcde9cd915d6985
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=afterlives+of+the+rich+and+famous+pdf In PDF document text
    • http://files.enzobrand.com/uploads/1/3/0/8/130873758/tixenoribepox_dobobuxu_zotodaxuxuga.pdfIn PDF document text
    • http://files.wcrc.info/uploads/1/3/0/9/130969097/nawol_gapulijudanusid_xujitil.pdfIn PDF document text
    • http://files.premprayojan.org/uploads/1/3/2/6/132681880/mazoxabazabuv.pdfIn PDF document text
    • http://zukuriri.highwaywalkers.com/uploads/1/3/0/7/130738799/530648.pdfIn PDF document text
    • http://files.sareeduniya.shop/uploads/1/3/0/7/130776518/gakerorizofabe_wavuwif.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/86483353603.pdfIn PDF document text
    • https://site-1039539.mozfiles.com/files/1039539/paxiralesinisudib.pdfIn PDF document text
    • https://site-1041676.mozfiles.com/files/1041676/gobajajupivi.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/zekuxumutot.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005a23.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005a23.bin)
    • https://uploads.strikinglycdn.com/files/f47f4cb3-4862-4136-a341-29fcf1afd58e/nipokulove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e57f2ec-f2b6-4a49-89ad-700c7e79d1fa/18114857277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa50051f-0d18-4a7d-a0bc-704a3d1d6be6/radunovurodifotuxenosuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a926d03d-391f-4375-a1c6-15966f00f57b/56497435908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be59822b-3cf8-4c3c-ac8e-0d2bd3758608/58436354261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764852d1-12e5-4890-8ea8-21d27afb2cc7/83425983829.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 extracted file (font_00_sfnt_off00005a23.bin)

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_off00005a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A23 5444 bytes
SHA-256: c6c38c74e89de4b5c639a3fe5432912343d61926a09e94a4ff12294ade3ad87f
font_01_sfnt_off00006c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C89 10496 bytes
SHA-256: e327c70f648c20621407ee57c611af2d580758ffe2c2a965a91168f7f19b9c25

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