Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e37a79ebc21303d…

MALICIOUS

PDF

42.2 KB Created: 2020-09-30 23:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 5fff724dcea463ae7e5e4694dbeea2af SHA-1: 4cd59d594f9cc0cb1d5f62b7fa3a649b37e6d20b SHA-256: 4e37a79ebc21303df592249b9c658fd5cb6b6a9d157f4d8bbee70cbfdfb610b3
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://ggtraff.ru/strik?keyword=php+open+pdf+file+in+new+browser+window In PDF document text
    • http://files.cwoodtheatre.com/uploads/1/3/1/3/131381369/1115538.pdfIn PDF document text
    • http://wepojij.cheapceramicknives.com/uploads/1/3/2/6/132680955/toboliroziz-gozomebufowe-jijesitidoso.pdfIn PDF document text
    • http://files.coollattincanadianconnection.com/uploads/1/3/1/3/131380342/01c14d43.pdfIn PDF document text
    • http://files.tranquilitymindbodysoul.com/uploads/1/3/1/8/131871462/sitow.pdfIn PDF document text
    • http://wosijox.claystories.com.au/uploads/1/3/0/7/130738779/05dbab430.pdfIn PDF document text
    • http://newazopix.oneswaggent.com/uploads/1/3/0/9/130969483/7664556.pdfIn PDF document text
    • http://files.riccivineyards.com/uploads/1/3/1/3/131398076/5744740.pdfIn PDF document text
    • http://files.monaghanmentalhealth.com/uploads/1/3/1/3/131379801/824084.pdfIn PDF document text
    • http://files.kbrerajewelrydesigner.com/uploads/1/3/1/8/131856956/gibesulozexug_bulewa_demomi_xikar.pdfIn PDF document text
    • http://files.sporcktileart.com/uploads/1/3/0/7/130738837/kufuxorav-jelepizakud-favesavup.pdfIn PDF document text
    • http://files.broomandblackberries.com/uploads/1/3/0/7/130775797/letokexaladisa-wapanadijizepu-nepomaku.pdfIn PDF document text
    • http://files.chicagonfc.com/uploads/1/3/1/3/131398308/f614b.pdfIn PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/lefumenazoxosinevobabo.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/87216689446.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/munuruligokanizu.pdfIn PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/xajiliximeritivuxusodabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 5152 bytes
SHA-256: 8f43f5cc5152f6ff506703f24b51a28017c55b5b91807baefc14ae47be7ec546
font_01_sfnt_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10220 bytes
SHA-256: d5e92be6b74c3a19b20e52b9b0daf3f8922932950601965543cbc392624fc671