Malicious PDF — malware analysis report

Static analysis result for SHA-256 93da071d50d52e45…

MALICIOUS

PDF

47.9 KB Created: 2020-11-07 04:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5591e696b3171eb865a97e53f46676fb SHA-1: 1d19541f540583d6d4feb06e7c001db5b1a2f815 SHA-256: 93da071d50d52e452296c91fe830f73070a7d0e98d4442a70f7f59c35e603d38
126 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, indicating it functions as a link farm. The primary URL, 'https://traffset.ru/123?keyword=elle+greenaway+unsub', suggests a potential SEO manipulation or phishing lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute malware or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=elle+greenaway+unsub PDF link annotation
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/956cd978651ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5f96be63851dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://laridemada.files.wordpress.com/2020/11/19800741954.pdfIn PDF document text
    • https://zebebex.files.wordpress.com/2020/11/65414133153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e74c46-0251-4a4f-8be8-01dad6590ec4/35913065706.pdfIn PDF document text
    • https://zapawex.files.wordpress.com/2020/11/kuzegisawam.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/57406872253.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39edf088-159b-42b8-829d-2e6a46dbb139/gutijivijusiwosugila.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b799a940-8df4-4713-850a-b8dae278b1f9/dumuparaw.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_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 5144 bytes
SHA-256: 1c09e947c5fa418b932dc9aa4321592d3ca464f30ca1b3320b10c0b8998b3842
font_01_sfnt_off000090ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90ED 9964 bytes
SHA-256: aafd1d27a8d69b7f47ab80bf703cdc993362b454b68dbdc12a9ec6eec1f055c2

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