Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fe715124c1aa7c…

MALICIOUS

PDF

66.2 KB Created: 2020-11-07 12:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-19
MD5: 94896f8f52bf001a882e53d8d3e82f32 SHA-1: 5107a4aaf6f3f28923d32265f99948361403aa0b SHA-256: 26fe715124c1aa7c3e3075d47c838238f19b073655dbf01717736accefe14d02
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rafuwufavirose.weebly.com/uploads/1/3/4/3/134334278/8424259.pdf.
  • 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://trafffi.ru/wb?keyword=ostinato%20definition%20music In PDF document text
    • https://s3.amazonaws.com/mufukep/riesgo_electrico_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/poweredge_t30_specs.pdfIn PDF document text
    • https://rafuwufavirose.weebly.com/uploads/1/3/4/3/134334278/8424259.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/4780375.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c3cc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c3cc.bin)
    • https://uploads.strikinglycdn.com/files/b787e560-6e01-486d-870a-794cb41e9115/wixifuledaguxemonaxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3c66b9-5fbd-41c6-92e8-8bc0d3cd01b4/web_quest_algerba_1_car_ownership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a69b78-fc5a-4c8a-b132-f41bbbe81fa8/piledigajokovujutugetunak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d185bf6b-ac13-4001-846e-f1e4e218e325/pogo_games_unblocked.pdfIn PDF document text
    • https://towafafu.files.wordpress.com/2020/11/lorosikedudikofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf874248-aa2e-4461-9520-4b800f4bdad9/werojajevusigifalasuvupaw.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 extracted file (font_00_sfnt_off0000c3cc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CC 5068 bytes
SHA-256: ca8f30e7ec1f4e909982a2e6311270d0eb261448bffbacbcbe00b07c8258c657
font_01_sfnt_off0000d500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD500 12464 bytes
SHA-256: 3a9f4c62070c35ff4e9aebf470828979c68c4b17a0f54b332655abbe038dc104