Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9197df8be832be1…

MALICIOUS

PDF

39.9 KB Created: 2020-11-05 19:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 710d3a565f09258d4ea503d24836e4cf SHA-1: 7d09712d71c2768190cddb0437964dbc46110b83 SHA-256: b9197df8be832be10c0d5368ac5faeb410972ab9d7a8e5ca27f0c22ae1781919
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://traffine.ru/aws?keyword=cool+math+cupcakeria', suggesting a phishing or scam lure. The ML classifier strongly indicated maliciousness, and the presence of multiple links on disposable hosting further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffine.ru/aws?keyword=cool+math+cupcakeria In PDF document text
    • https://besogedawifajop.weebly.com/uploads/1/3/4/2/134234635/1750332.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/2639413.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/sinuxalumejomajazo.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/6938031.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/0efa7.pdfIn PDF document text
    • https://disomigezet.weebly.com/uploads/1/3/4/2/134234605/jurawefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8b177b4bbdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f95e1a739302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f9d8260454e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5f8d976f3acaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f87afd530797.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/f52328e6-a62a-44b2-8c0b-6d182e413b7d/72520924006.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/kapugalakixago.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBB 4964 bytes
SHA-256: 1aa1d902d76fc63b1f6923048c711668f7ca22dd1c31b6a12624c52b8580f1e9
font_01_sfnt_off00006e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E69 10700 bytes
SHA-256: b38be035a403d96720e1de3f6078ed1148d1bc1015ce59d131ba8b1821f3ea19

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