Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e4be0d903c4753…

MALICIOUS

PDF

33.3 KB Created: 2020-11-09 14:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16f8635c66981516b210d1c6882a8f2b SHA-1: 770489d3ccbbff2eff827a05c64caaa4b7fa2a57 SHA-256: 50e4be0d903c47532bd91f4528bae549ea714d5151fa21ad2839de9d550641e4
94 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'traffmen.ru'. This URL is likely used to funnel victims to a phishing page or download further malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector strongly suggest a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=hmphotography+emily+morrison
    • https://subulutug.weebly.com/uploads/1/3/4/3/134349811/revulovolabomeje.pdf
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/gunujalimodaxatovaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lovetijif/96626360269.pdf
    • https://uploads.strikinglycdn.com/files/859989ad-08bf-4888-96ab-1aafb619baf2/61840775908.pdf
    • https://s3.amazonaws.com/likadojivivofu/braeburn_2020nc_thermostat_manual.pdf
    • https://uploads.strikinglycdn.com/files/6c146e3b-d1fd-41fd-9485-90f587e40746/18374746897.pdf
    • https://s3.amazonaws.com/kesumasaka/zaxozos.pdf
    • https://s3.amazonaws.com/susopuzupure/cambios_biologicos_psicologicos_y_sociales_en_el_adulto_mayor.pdf
    • https://s3.amazonaws.com/dalava/ccnp_bgp_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/2c919f66-3f2e-48d1-8c8b-83f4a6897a35/93006685983.pdf
    • https://uploads.strikinglycdn.com/files/57512691-9d2a-4153-b823-17278a0a5ad1/57998357494.pdf
    • https://uploads.strikinglycdn.com/files/39aa87fa-28f1-44f7-abfc-0d94fccfc110/sirutimir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004500.bin
9227f435011923ac302314c88d472a28b020d29fc353659c06d051752cfd8314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4500 5296 bytes
font_01_sfnt_off000056dd.bin
60a699b5a6993696bba3e52a40f4208d9a2992f1242289fe0c123047a6080036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56DD 9944 bytes

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