Malicious PDF — malware analysis report

Static analysis result for SHA-256 af221d61f2244714…

MALICIOUS

PDF

37.6 KB Created: 2020-11-06 00:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 9be4fd01c161d35da7c0fa92eabb4ec6 SHA-1: 3939c8ab4eaf4d32b240630dc6f1421b1a7b2816 SHA-256: af221d61f2244714e4ba266e7fb45b5697ff028b162927c6d47cce3b0fddb021
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/strik?keyword=nathan+hale+elementary+school+in+lansing+il PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9518b242746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8802fa86ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420441/normal_5f9727284a1eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f966f6e76cfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f8b1c962412e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421787/normal_5fa33d8acae5e.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/mupukesunobaga/big_head_basketball_unblocked_minimunch57.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ff5722-7f12-4c0a-a974-603c64735e6f/soduvasofuwopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f1c5d8-e8f5-4dd0-a078-3c00da922af3/repegumadiwaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a64da86-36ad-454a-8410-0e20f272f63c/wejew.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/jadanoketomus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95014fa4-8871-4d9a-824d-b191b4af291e/9039627537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1346d300-27b2-4ca4-97b9-895948faa500/nufuberirigogifu.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_off00004f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 5284 bytes
SHA-256: 279c6cb03466541b8d5e6ce1a5c2f0b0cf5df1d1dfbfd9fc518a41b8a6dc315f
font_01_sfnt_off00006170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 11564 bytes
SHA-256: a0c3f1c1eb6b08be39f4d3a90594f5f9db5c80fef05de2451075ba164455e569