Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09514e31de56fea…

MALICIOUS

PDF

73.8 KB Created: 2021-01-19 06:54:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b04d0987e38383b7630ac6d0a127bb2e SHA-1: 999f5f43e264b1b214f2d968bff642d3c015190b SHA-256: a09514e31de56fea3b481643671d3757c3382823f10621e04af518d5d07039a3
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or further payload delivery.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffmen.ru/123?utm_term=japanese+school+shoes+white In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5fbf4f82412d5.pdfIn PDF document text
    • http://komamoj.22web.org/regular_polygon_worksheet_grade_3.pdfIn PDF document text
    • https://site-1171522.mozfiles.com/files/1171522/sisalesubu.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/memul/65407637777.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/bollywood_movies_2018_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/biology_templates_illustrator.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/3ds_game_cia.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/cetosis_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/back_pain_exercises_arthritis_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/71075093515.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/pivutowakujo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/pujogofufikuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/zaforekilajutikuwofopez.pdfIn PDF document text
    • http://pamerugug.epizy.com/ashampoo_burning_studio_2012_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/sagezogani.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/series_convergence_tests.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_off0000e42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42A 5004 bytes
SHA-256: 092f4a71bea2d510ee5542be80750e6878e820d0f5cebef1a0e86a54681d1706
font_01_sfnt_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 10912 bytes
SHA-256: a8fe32e43b8e346bb8040454a6fead4773be9d69f57eacbbec6e0b3a79c06d80