Malicious PDF — malware analysis report

Static analysis result for SHA-256 085380851c20e3f2…

MALICIOUS

PDF

33.6 KB Created: 2020-10-30 13:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 791689ab7c1515726dfc7a0c6aa939b7 SHA-1: c1a08e529f163b1b94c20f674a0f8be10f38d9ae SHA-256: 085380851c20e3f20acb55856e37205c52f9a88d0a89f795e9a47af966ec05da
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://cctraff.ru/123?keyword=jimmy+the+baker+sticky+buns, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded link suggest it is designed to redirect users to a malicious site, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/123?keyword=jimmy+the+baker+sticky+buns In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8e520d8893e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5f98018e769f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/fimaratodikexeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcd532d-1280-41ce-9010-1417ceb01ba3/70433880151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4139bc08-3561-4133-93cf-7dae1f85ad7e/86356444942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867db1ef-4d95-4f21-9455-5ede808c5f28/gokorudufisegix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c771f3c-1a4e-4770-82b7-54299c2d8e8b/gesizoguwel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164dca85-41d6-4cb1-a55c-2f0cf26c4773/93011652766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02da0ddb-daf5-4a0e-b325-b8ebea3d604b/sijetik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e135f0ee-7151-40e0-afeb-0e383411257b/jerri_mason_whittaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e27d263-0cb1-430c-844b-d2a3f6bf831a/hf_strong_or_weak_acid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a3e59a-3dfd-4527-beff-fdae0171b3e4/kamasetuviwuwawim.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/administrao_pblica_augustinho_paludo.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 5

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_off000045b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45B5 5300 bytes
SHA-256: cab392c73e6e0566b3fa4374af4f4d53fd6879937c583410ab09574b1e0a4e02
font_01_sfnt_off0000579a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579A 10292 bytes
SHA-256: 3e870ade02eacfbc31d98a01c447b04ff52ca95e35f4efa72e5ea188ee2a2b3f

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