Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3bf2ca93cd3d6e…

MALICIOUS

PDF

44.0 KB Created: 2020-10-29 18:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 24df012b3b26fe3d5ff2111ef5a64c60 SHA-1: 7400fe10d16e38c676c6f4c5d7e4ec6783c8fc19 SHA-256: 4e3bf2ca93cd3d6e678cca877c05860cfc6b7462459c8d4c122bce9e2a387e75
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://ggtraff.ru/strik?keyword=historical+context+definition+literature In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5f961e7898d86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f8d194689fa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_5f9a91719b451.pdfIn PDF document text
    • https://fuxuwalanad.weebly.com/uploads/1/3/4/4/134487417/terewefarazobas_vovogivoredodo_zelejuxizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f989fb3056a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5f9758d2cca53.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/zivopikadawo-roberinipine-goneduxam-joxalitawip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f90f10ad9c70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5f97af98217c8.pdfIn PDF document text
    • https://kavaxaxogemiren.weebly.com/uploads/1/3/4/4/134441995/b3991e91.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/7857710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f89bfb572740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f8ab4d8f2d2b.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/44993d89-48a5-4d84-b6bb-93b1e48b274b/sebopasog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c26569-bb40-4a4d-b31a-df22593b00df/6518045213.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_off00006e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7A 5044 bytes
SHA-256: a9aa83bffcd7db0abd6e38c960f2afb8d0da7da64ef80ccb2d22ebd82fd3bc6d
font_01_sfnt_off00007fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB2 10364 bytes
SHA-256: c0dfaa20c8e4c4234eb139ed02fa56bfe6ab61b1b8de5108a1802cc49befffb2

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