Malicious PDF — malware analysis report

Static analysis result for SHA-256 84794b7ca46d572c…

MALICIOUS

PDF

67.1 KB Created: 2020-10-12 20:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 82102f875837c9029bb08c96168b1f5b SHA-1: 299d06d65e270b6f6454c1488a8e639e3253a304 SHA-256: 84794b7ca46d572ce5ec80a034b59d5e7a1e43da749b30c5cd75fea93f5eefe7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to disposable hosting and ultimately redirect to malicious infrastructure. The primary redirector URL is identified as malicious. The document body, while containing academic-sounding text, is used as a lure to encourage users to click these links, likely leading to further malicious content or exploitation. No scripts were extracted, but the PDF structure and link analysis strongly indicate a malicious redirection attempt.

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=stationary+stochastic+processes+pdf In PDF document text
    • https://site-1041284.mozfiles.com/files/1041284/34102808831.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/wekux.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/75229863429.pdfIn PDF document text
    • https://site-1044209.mozfiles.com/files/1044209/lifekolasatevuzo.pdfIn PDF document text
    • https://site-1043415.mozfiles.com/files/1043415/purizexofoda.pdfIn PDF document text
    • https://site-1042887.mozfiles.com/files/1042887/muroweverurepipolak.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/musidavafuwelavuwak.pdfIn PDF document text
    • https://site-1038792.mozfiles.com/files/1038792/21841401222.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000096a5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000096a5.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000f12d.bin)
    • https://uploads.strikinglycdn.com/files/ad0d380a-71ce-4b11-9ce0-a785272d83b7/dusuzajew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecde12c7-81c7-4932-aa94-94c1ece48e4a/69077548220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929bcbd1-3229-455b-aa2f-34e326e1f924/86154399999.pdfIn PDF document text
    • http://www.maths.lu.se/kurshemsida/fmsf10masc04/In 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_off000096a5.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000db9b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000db9b.bin)

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A5 5204 bytes
SHA-256: 8d2a5981f8ffac27ec0c8e91af01e4df1be50f157da8f68ed7c87b8c4c8e8a4f
font_01_sfnt_off0000a845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA845 16392 bytes
SHA-256: 6896abdba4e0503f1350799e1dbb0d615f456a82ff98c67c5c9f29afbda62e75
font_02_sfnt_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 16256 bytes
SHA-256: 30bc9b95a3db1c65724595dbb01ae5049c7e3c4c4a82147136ace553b457d6e7
font_03_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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