Malicious PDF — malware analysis report

Static analysis result for SHA-256 7955f04a09ec67ff…

MALICIOUS

PDF

66.7 KB Created: 2020-10-01 05:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3eacbbabcf273c853869e920d8ab0ace SHA-1: eaa8c72b212bf7ee24b2c5b30b6a4c0a5e100a75 SHA-256: 7955f04a09ec67ff78199c7b804aa00639deef42552a2201c1312f03e24deb92
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/strik?keyword=conformational+analysis+of+cycloalkanes+pdf In PDF document text
    • https://site-1038520.mozfiles.com/files/1038520/vexigelixagom.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/93984429362.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/jegaxidukifiseku.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/29689246808.pdfIn PDF document text
    • http://lukesav.alexandrawrightcoach.com/uploads/1/3/1/4/131453109/vomazanibifitolod.pdfIn PDF document text
    • http://files.ballisticracecars.com/uploads/1/3/0/8/130874370/e44a2.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/fd2a0263-e55d-4da4-9d85-ad47dc6a409e/13962409830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/sales_contract_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1648/1699/files/desinodatapaso.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_off0000c793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC793 5372 bytes
SHA-256: 9a342e1fbee2a1662abf537b260c0457f47f035afa29b41a8eeb58885788d4f5
font_01_sfnt_off0000d9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 10628 bytes
SHA-256: ec891bc1faf1fa0c535cdd86a28f7c0573174bb4113834c3f3262ca74564ae31