Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6842554a4352d4…

MALICIOUS

PDF

47.6 KB Created: 2020-10-11 01:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-30
MD5: 10446136031c08f9b078f80d789ad75d SHA-1: a9f003700fd6ff044a0bc8c203d4dfad2dcf3bdd SHA-256: 8f6842554a4352d497490e8ebe17f94c882c30b96b082ac897b4746b18e8e51d
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=boxcar+segmentation+of+the+retinal+veins In PDF document text
    • https://site-1041395.mozfiles.com/files/1041395/53320177179.pdfIn PDF document text
    • https://site-1039268.mozfiles.com/files/1039268/43062455666.pdfIn PDF document text
    • https://site-1039935.mozfiles.com/files/1039935/2730641993.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/63122304825.pdfIn PDF document text
    • https://site-1038955.mozfiles.com/files/1038955/zetokosugaxofuwi.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/mubanutozixenapazil.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/mudum.pdfIn PDF document text
    • https://site-1038525.mozfiles.com/files/1038525/fupokekonenijitovodigupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007b6b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007b6b.bin)
    • https://cdn.shopify.com/s/files/1/0435/2894/5819/files/sony_dsc-h50_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/tanuwosevulinogojemolet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3915/3054/files/bifogezamigegop.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_off00007b6b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 5472 bytes
SHA-256: 2f7cc8ddeb1fa9967a2eaf7574ad5b449f5dd9ce567abd8ba821b79a50b8748b
font_01_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 10436 bytes
SHA-256: f7c387f65d366f93b41346f38b49c944ac5c63dad7f7cb2dafacf3a9514374f4