Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a86af3b4ec4ae4…

MALICIOUS

PDF

40.7 KB Created: 2020-10-01 09:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3a160b607869716843fc4757c2997f87 SHA-1: 55fa2620a76db9d00f20e13cb937f0b0ea82622d SHA-256: 94a86af3b4ec4ae4c8435d25bf123458c3f52eeef9e703ecf6d48dac22bca699
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://gettraff.ru/strik?keyword=aula+de+viol%25C3%25A3o+iniciante+pdf In PDF document text
    • https://site-1038326.mozfiles.com/files/1038326/20681878791.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/61624188878.pdfIn PDF document text
    • https://site-1039731.mozfiles.com/files/1039731/1927562583.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/10522400052.pdfIn PDF document text
    • http://togefe.robertmcaffee.com/uploads/1/3/0/9/130969265/sududefukiwawo.pdfIn PDF document text
    • http://files.johnbrittonbuttrill.com/uploads/1/3/1/3/131380175/2347135.pdfIn PDF document text
    • http://misokuje.flashfoto.com.au/uploads/1/3/0/9/130969428/bozumixeloded.pdfIn PDF document text
    • http://mosejebo.shoptheluxebaby.com/uploads/1/3/1/8/131871609/vebuse-kemow-pawegidetami-posibimozodonuv.pdfIn PDF document text
    • http://gupaledo.ucyavneh.com/uploads/1/3/1/4/131437940/jepef_wunurebow_xaxon_rixuruwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bc503d-7d4c-4426-87cd-cfc12829f83e/josajiteruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07357684-4c90-47a3-a51e-d56615f9f920/fawiledowexuzunid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4b2395-8f4f-498c-9846-c5c52795709b/gufojediduzugomefozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be05f63-53b7-4781-9938-92a135f104a6/66455026913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573b6c04-8be1-4c2d-9347-107cf0067989/xikuwajurivaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f67137-bfaf-4614-851c-01f2c7581980/niriluzaz.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 8

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_off00005d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5244 bytes
SHA-256: 2a0fbb735de0c7b99b8d7e388cc8d7625da2158ed9bcb0855464d4d0616bf8de
font_01_sfnt_off00006eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 12576 bytes
SHA-256: 50c496694192929ebcc3a20903cf60f13022c07e553992bf12a4c2821bf57089

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