Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28b26a63f592d9…

MALICIOUS

PDF

40.2 KB Created: 2020-11-02 12:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: c6a924c650137a3a8b1c53fe89e0fe5b SHA-1: 87ff03ea20bb5585081ae1d337b55d99d255b58b SHA-256: af28b26a63f592d9ce3ec3e6754c3757569f51ff6e54a43df3d84db7184dfabb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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.
  • 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=calpurnia+to+kill+a+mockingbird+traits In PDF document text
    • https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/939b2db6d7643b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2328/9496/files/pcr_agarose_gel_electrophoresis_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d44d8c9-54a9-483c-90cf-b05d2bfe9470/84986409376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4473/2580/files/29018853048.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/19334766157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d59421-b605-4804-b12b-e0622bab146d/ruwapeduzixemejakel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2270/4550/files/jebibabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7651/7529/files/refrigeration_compressor_operation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2310/4669/files/advantages_and_disadvantages_of_strategic_human_resource_planning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2456/6432/files/filizepitetemaxusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/91214283251.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_off00005e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 5504 bytes
SHA-256: 962ff5e6280711a9d0c685623745f33e763c1b299d9b88afd06d1c5a3ee96119
font_01_sfnt_off000070e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E5 10448 bytes
SHA-256: f8b0fd6cad4e26819a5ac49eaa8d3bb8c88c448ebf7e1f996651b1300c55ddd3