Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f9b47e0bc9e9be…

MALICIOUS

PDF

47.9 KB Created: 2020-10-05 11:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: a8e0e587b933cd1e89e628b8e841efe3 SHA-1: f2e587fcb45d251ca3ee9c506e34560ddf584dde SHA-256: a4f9b47e0bc9e9be78f30926814eba7981969dac189202d14220369537a67b78
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=trig+cheat+sheet+pdf In PDF document text
    • http://wakeravog.sweetheartfrenchies.com/uploads/1/3/1/4/131408183/vezubekebu_kubid.pdfIn PDF document text
    • http://files.calliecolifecoaching.com/uploads/1/3/0/7/130775045/tekimafelifisato.pdfIn PDF document text
    • http://files.globalwarming1.com/uploads/1/3/1/4/131406369/xolawez.pdfIn PDF document text
    • https://site-1038592.mozfiles.com/files/1038592/49226972927.pdfIn PDF document text
    • https://site-1041614.mozfiles.com/files/1041614/pumilabawokeputobur.pdfIn PDF document text
    • https://site-1037842.mozfiles.com/files/1037842/balogoxin.pdfIn PDF document text
    • https://site-1041405.mozfiles.com/files/1041405/muluv.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/boxapuzipalagarewifu.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/93169032423.pdfIn PDF document text
    • https://cheatography.comIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005d2a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005d2a.bin)
    • https://cdn.shopify.com/s/files/1/0482/6012/0737/files/nikogejuditomux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3401/2579/files/frigidaire_gas_range_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8399/2740/files/43743851329.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_off00005d2a.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00009c9d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00009c9d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2A 5332 bytes
SHA-256: add1e36a100f2a5fb602ab81feb623e59bbedabed7ba2c65af0cee18910739d8
font_01_sfnt_off00006f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 14364 bytes
SHA-256: 8d7fbbb870d52a8545888c170decf8b01b83c1acf5b8f04e3f16368ec7ebbbee
font_02_sfnt_off00009c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9D 16060 bytes
SHA-256: 18c692b803dfb563b9aaac888f1f44c703b8da0f4cd99c36eb2c506a3e4d2641