Malicious PDF — malware analysis report

Static analysis result for SHA-256 87517a9c6020613e…

MALICIOUS

PDF

46.7 KB Created: 2020-10-13 21:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-05
MD5: 433f0b4acc55f42daf3422d895df7568 SHA-1: 48fb0cf357e1575400ac7555093124a9f6b71f99 SHA-256: 87517a9c6020613e232ef69a0faef13132c61ebe41d87e0df9a6767ce6a19b82
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=cholesterol+food+chart+pdf In PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/76050322391.pdfIn PDF document text
    • https://site-1038439.mozfiles.com/files/1038439/89798140398.pdfIn PDF document text
    • https://site-1043576.mozfiles.com/files/1043576/bopolokizanavanejerak.pdfIn PDF document text
    • https://site-1038422.mozfiles.com/files/1038422/vunufedugibapazi.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/perunonalovijozi.pdfIn PDF document text
    • https://site-1038674.mozfiles.com/files/1038674/55548979629.pdfIn PDF document text
    • https://site-1039809.mozfiles.com/files/1039809/vinevekujatogamejasi.pdfIn PDF document text
    • https://site-1039163.mozfiles.com/files/1039163/84723729070.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/62610925799.pdfIn PDF document text
    • https://site-1042204.mozfiles.com/files/1042204/57092552087.pdfIn PDF document text
    • https://site-1039802.mozfiles.com/files/1039802/zorabinavesudofonop.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/gezokowiroxarigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000798c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000798c.bin)
    • https://uploads.strikinglycdn.com/files/4b447b1a-c9a8-48d9-a2a4-e39644697d12/wavulab.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_off0000798c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000798c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798C 5148 bytes
SHA-256: 2279ce7c1d94a784db0ca2830d19535141278b265fde6d72e7d5018a74697e4e
font_01_sfnt_off00008b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B02 10432 bytes
SHA-256: 058421c67b759226f034bc9a6796b434d3769e65fe53723dec54a9d7cc8dfb79