Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4a635202f72a2c…

MALICIOUS

PDF

32.2 KB Created: 2020-11-01 16:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b99603a0b175ba64dd1ee290da0cdeb SHA-1: 7685ca04fbe5eb99334f474b2ac83cb6fe1af1d0 SHA-256: 5f4a635202f72a2c4d1b24a5e42fc4bfd57fe3de06e847d913fb85b5ee4105dd
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/123?keyword=behind+blue+eyes+lyrics+video'. The document body also contains this URL, suggesting it is intended to trick the user into visiting a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

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://ttraff.club/123?keyword=behind+blue+eyes+lyrics+video
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f964dafa6706.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5f99c996d7676.pdf
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8c66a746f3d.pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8f9c5bc0267.pdf
    • https://cdn-cms.f-static.net/uploads/4413242/normal_5f943db86f9b2.pdf
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f9c2e58db2aa.pdf
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f95ee7589252.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sigobija/biology_objective_questions_and_answers_for_competitive_exams.pdf
    • https://s3.amazonaws.com/fokapikow/sonupibizisexiguvejud.pdf
    • https://s3.amazonaws.com/pazifetanegapu/27868033678.pdf
    • https://s3.amazonaws.com/kepevipawit/cyberpunk_2020_free.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_off0000410c.bin
e48d67f59fbe937d57a4585494f80943274551b2b0e8bcd70db92425bc6dd5e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x410C 5168 bytes
font_01_sfnt_off000052a4.bin
1edfef8df849d7c548011df6607b857618a11594c03ca937727fddebbdf5df9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A4 9900 bytes

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