Malicious PDF — malware analysis report

Static analysis result for SHA-256 485a2e7715153bae…

MALICIOUS

PDF

59.4 KB Created: 2020-11-14 12:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d7be97aa6aff15fafe7816d16f869ade SHA-1: d503ec26dc1e4c94a2c98ed470cb3fbf2da60ec1 SHA-256: 485a2e7715153baef6b1c3b56b4557d02ed13b3985da2ba99000cf520b54b07c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no explicit scripts were extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=sopa+de+letras+pdf+faciles PDF link annotation
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/3613271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_5faa00bb99f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_5f9e09653cf87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f900528a77cf.pdfIn PDF document text
    • https://pasutexovemas.weebly.com/uploads/1/3/0/9/130969198/647ef24.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.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/vunizi/observation_and_inference_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/62918355638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e4e4f7-191d-408e-b5d6-4270a1b00e2c/demanda_por_incumplimiento_de_contra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80677ada-dc03-4f36-960f-3e95fad819b8/lectura_comprensiva_para_nios_segun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236d82d8-fefb-4fee-a830-9e4b06015bf5/south_san_isd_pay_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa40b6c-d6e4-4e52-82e0-c7b7beabbb03/falamupubutupevazarezaxid.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_off0000aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEE 5252 bytes
SHA-256: 53d0ec4486e98ad0db0e6755e9df5e66e853e284f7f111762a51a174b5612eaa
font_01_sfnt_off0000c0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D9 9624 bytes
SHA-256: 200cd1169ddb9398ab8926d3af46dddb870b795d25b45619d5277ceb10613df8