Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0ffa2939494a92…

MALICIOUS

PDF

40.4 KB Created: 2020-10-17 06:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2338200e87289e8c4e7d4abd6dc99254 SHA-1: 17e60e6f63a91f0acab49606beb093ef77b86489 SHA-256: 9d0ffa2939494a9226d238b704936ba9f8ade6c28cc26974dcc31f56cbc4dc4a
124 Risk Score

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://cctraff.ru/strik?keyword=nf+p92-+507 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8716a9998f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f87d775b3620.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/gosowitiza.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/154f826c39fded.pdfIn PDF document text
    • https://fomomeku.weebly.com/uploads/1/3/2/7/132712435/3787099.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/5b7925e0f2c.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/22089849-756e-4650-89fc-9cfb12387fff/47887117456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c49fa71-12f4-4a36-b4e2-ff3b9a275a97/winenoledisomelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e55a7d-f312-4c68-9f76-8f1d7b0654d6/rudefusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0097d19-9233-488d-872f-81304a7ab15b/37220037850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2214/6472/files/80102853543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5512/3105/files/carry_handle_scope.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC0 3212 bytes
SHA-256: 748e1223d06d8ac717cd07391261dab2073868aa99be05a5f720895b2c6390de
font_01_sfnt_off00005a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A40 5016 bytes
SHA-256: 8eff8c36af3c77eb45e116bafa40a0f1d28401612667d53c6cb7efcbeaccd877
font_02_sfnt_off00006b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 12164 bytes
SHA-256: 3fbfc6f6939af2afa3ae22a46d9a23a1505a34ee153279060d45ac0996b8d4bf

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