Malicious PDF — malware analysis report

Static analysis result for SHA-256 72671b71b97035dd…

MALICIOUS

PDF

57.6 KB Created: 2020-10-11 13:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-12
MD5: 221e1a539e11055211ff327d6927c194 SHA-1: a9e89029cc65342655088eb9a37cb8d5fce52553 SHA-256: 72671b71b97035dd5058bd76c58fc8ec090126948621daebf8aa701be9b0dc88
184 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.
  • 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=discografia+king+crimson In PDF document text
    • https://site-1043752.mozfiles.com/files/1043752/pebevowekixajuzapagazub.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/gijot.pdfIn PDF document text
    • https://site-1039846.mozfiles.com/files/1039846/pemupalizusijejizutup.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/46850176734.pdfIn PDF document text
    • https://site-1042276.mozfiles.com/files/1042276/94394773594.pdfIn PDF document text
    • http://wokabuf.sportsphysioonline.com.au/uploads/1/3/2/6/132683071/8555239.pdfIn PDF document text
    • http://files.spirechamberensemble.org/uploads/1/3/1/8/131871859/7652634.pdfIn PDF document text
    • http://xutava.studytospeak.com/uploads/1/3/1/3/131383332/nowujejuzabogi-milaketa.pdfIn PDF document text
    • http://files.turquoisebalance.com/uploads/1/3/0/8/130874488/ae13ec.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/13577175237.pdfIn PDF document text
    • https://site-1039811.mozfiles.com/files/1039811/mafuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a1a8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a1a8.bin)
    • https://uploads.strikinglycdn.com/files/949ffd50-9377-47bf-8f54-c7e26db4ee62/kojaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9ab908-484a-42d7-9d08-548848d58cfc/85044766288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b53c973-29dc-4358-80f1-7ff9d60e3fc1/mafubapivixisitefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b5d6a6-831e-4998-a854-e09233862dde/60343243585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff02fde-c94e-4b41-8a85-baec974bb503/64932891178.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_off0000a1a8.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A8 5232 bytes
SHA-256: af05bce18b4ba15ee8c486db7e13f3864de390a1335edb5f62c762b4d6ef328b
font_01_sfnt_off0000b360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB360 11328 bytes
SHA-256: 548633751d93cbb5a3a1dce902f6fc73bd49846ebe0b6c5fe2c0afe22f85afdf