Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cd034cacd76159…

MALICIOUS

PDF

55.4 KB Created: 2020-09-19 13:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cff27364876c98a8ae5be5e4e5ea236 SHA-1: 296146672c2e00276126ec399ac57b41d9e2893e SHA-256: 83cd034cacd7615963476eaa98b45dfb57f47b22dffe989509ff457c585b2efd
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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://ttraff.club/wix?keyword=american+wedding+traditions+rehearsal+dinner In PDF document text
    • http://files.machinerysolutionsgroup.com/uploads/1/3/2/8/132814400/jesufuzidugupelowexe.pdfIn PDF document text
    • http://tanusa.anitaayersministries.com/uploads/1/3/1/3/131379312/8807839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78f1e30d-f8e9-4f07-90ce-3f19c802323a.filesusr.com/ugd/2c7c49_be1c6e01145c42dcb3ad2be65c5cad15.pdf?index=trueIn PDF document text
    • https://1ba3e04c-82c0-4a24-9340-18844e916c11.filesusr.com/ugd/314c35_845aaa83ecc7411b82eb3663e3eb10bb.pdf?index=trueIn PDF document text
    • https://3a4d2005-21ad-4ab4-a581-06c0cc17f858.filesusr.com/ugd/d3758e_85897bd3dff94eeab4cf7c08c5ea22ae.pdf?index=trueIn PDF document text
    • https://54cb3c65-b5b7-499f-8d4f-788313767b4e.filesusr.com/ugd/466fa0_962fff0ee4bd4d8cb336c8380e98e8f9.pdf?index=trueIn PDF document text
    • https://d251921d-5791-48d9-b808-099802690803.filesusr.com/ugd/3b0c81_5631415a4c8e4b0083ecc2053361e670.pdf?index=trueIn PDF document text
    • https://e2b5ebe5-fbeb-45c2-bc11-93893989d210.filesusr.com/ugd/ca847e_9348bf5eb606490997c8fbf1831cb458.pdf?index=trueIn PDF document text
    • https://be0661ef-a5f5-493d-80a2-48f45e3a7fa9.filesusr.com/ugd/3801ff_3739da4a115a4ecba43f3f1493247987.pdf?index=trueIn PDF document text
    • https://bb723ef4-2675-43b9-9047-50674819ffb6.filesusr.com/ugd/fedf23_bd56435fe7124514bb6df18e1f7dbc48.pdf?index=trueIn PDF document text
    • https://a05ec3c7-d6a8-4cb5-a6ce-6b4f7d1fd93e.filesusr.com/ugd/ea2c45_6c5cb13810de4c078d196f08d4473fc5.pdf?index=trueIn 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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 7488 bytes
SHA-256: 8c8176ba2cd8411c07ed7cc46bdea0f629ad355dd7df7102526ab0361d1cbf7d
font_01_sfnt_off00009798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9798 5436 bytes
SHA-256: e9d7df70a013c08dc56b0ec3f2d80aa4a33f5a97562302d7cb030376aa1b8461
font_02_sfnt_off0000a9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F8 10724 bytes
SHA-256: e67718276a1637af3c087d366ddc5357d26262e841116e545fbf85cd2fc6a911

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