Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fa330b5a7decc0…

MALICIOUS

PDF

42.4 KB Created: 2020-11-08 09:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a76eb6c6ea3b1cce3c8525ad442da348 SHA-1: ec3153b582ccd6d6017af42d2a05eb0692880303 SHA-256: 39fa330b5a7decc060ac7516b27e8f8cc651ec35b8a89e12c6eb58991728cb6f
66 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains an embedded URL pointing to 'traffset.ru', which is also listed as an external URI. The PDF structure and embedded content suggest it is part of a link farm designed to redirect users to potentially malicious sites, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=jpoint+red+dot+optic PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f989aae3bdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5f9c8cc32d9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8822f4cb6df.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/mobir.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/nawubupatirusuvelilo.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/478a32043d87457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdfIn PDF document text
    • https://fepenowiridu.files.wordpress.com/2020/11/rilara.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/51595271635.pdfIn PDF document text
    • https://juvolubabeb.files.wordpress.com/2020/11/canon_pixma_mg3510_manual.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_off000068d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D4 4636 bytes
SHA-256: c06640340c29bca6d4b442da6bf9bbbd7e006b74886843e28a0fc7df3ba244ab
font_01_sfnt_off000078ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 10752 bytes
SHA-256: 1e4fe325297ca292aefd0c828eee100dc970e5fd9b6d5c08f110a87d80f93da0