Malicious PDF — malware analysis report

Static analysis result for SHA-256 3476812c577ff111…

MALICIOUS

PDF

75.2 KB Created: 2021-01-16 11:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a220bc8f01fba1294255ed8c48f2789b SHA-1: eee3ba31f32de06bfd39fb58e2712c84012eaa08 SHA-256: 3476812c577ff111760c359b61133be772b1a8d14121bef827e29e2805a7ecd8
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a primary link pointing to `https://ggtraff.ru/aws?utm_term=dragon%2527+s+crown+pro+ps4+trophy+guide`. Heuristics indicate this URL is part of known malicious redirector infrastructure and the PDF itself is part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=dragon%2527+s+crown+pro+ps4+trophy+guide In PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/diffusion_and_osmosis_laboratory_investigations_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fd61178097e7.pdfIn PDF document text
    • https://site-1178444.mozfiles.com/files/1178444/bike_race_motorcycle_world.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5faa5dd9d16f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426682/normal_5fe18ef009eba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fba113d9dc7e.pdfIn PDF document text
    • https://site-1243998.mozfiles.com/files/1243998/29186759296.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/weed_farmer_overgrown_apk_license.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5ff1fd8961e73.pdfIn PDF document text
    • https://site-1248967.mozfiles.com/files/1248967/49102892288.pdfIn PDF document text
    • https://site-1173132.mozfiles.com/files/1173132/ticket_to_ride_europe_rules_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392871/normal_5fc4ff48bd1e6.pdfIn PDF document text
    • https://site-1168130.mozfiles.com/files/1168130/70313581077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5fab55461f1a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/meeting_agenda_email_format.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 5620 bytes
SHA-256: c1ee83195720399314be1e72d7c125c8fcf346eec5a235a6576aa236c3ce20cb
font_01_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 10520 bytes
SHA-256: 125bf0a9a9f6fb0bba081d676142e17324ca6d0de8b58c21d896d64be2f675ea

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