Malicious PDF — malware analysis report

Static analysis result for SHA-256 5503f21dc3c412a8…

MALICIOUS

PDF

50.9 KB Created: 2020-10-09 12:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-04
MD5: bda9b9ccf574f5658480fe8d5c0e301b SHA-1: a696ab4edffe7419e027c42bba9db002c61f1d4d SHA-256: 5503f21dc3c412a8f70215922385cdd4f17010e92051b3169442b0260a4bcfd1
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://gettraff.ru/strik?keyword=cjbat+study+guide+2019+pdf In PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/50554554890.pdfIn PDF document text
    • https://site-1039797.mozfiles.com/files/1039797/99352724777.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/25493395179.pdfIn PDF document text
    • https://site-1038358.mozfiles.com/files/1038358/530756611.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/74447194847.pdfIn PDF document text
    • https://site-1038782.mozfiles.com/files/1038782/togakafabenevudago.pdfIn PDF document text
    • https://site-1041672.mozfiles.com/files/1041672/mewifumofiv.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/xoralufawuxigisa.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In extracted file (font_00_sfnt_off00007f4f.bin)
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off000087db.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off000087db.bin)
    • https://uploads.strikinglycdn.com/files/fe099679-c7ca-47c8-b38f-a3d8a9b15a47/jevomidatemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073b4b31-d1d5-49ea-a60b-c3ec65f0f5a6/79677026528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4cb659-0e2e-489a-be65-a8fa610fbad7/7438208043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17054b47-5679-45f5-bd29-f2693153be7a/87079410570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae91669e-444d-4d85-b8be-83b82bc919dd/likozezesoletetanaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f145a478-0d29-4827-bea7-fb7c1c385556/40525900793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8dd6346-2d5f-41ad-9488-6cd8da4ae421/13173339929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b2df20-a09e-46da-900d-1590cd54320d/94078044134.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_01_sfnt_off000087db.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 1724 bytes
SHA-256: 1af1fdb02f150e4b7fb9ab825036f356033ef8d1f6adfeb519aebbff9637efeb
font_01_sfnt_off000087db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 5788 bytes
SHA-256: 197f886cee8fe9adc025922cd7e93bcf016c14c60804795c71b58ec5e31dd6fe
font_02_sfnt_off00009bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAC 10180 bytes
SHA-256: af2789b0bd934a8304fd4ac772ac0f330bbda79c6d38af2090a4fa4564d36475