Malicious PDF — malware analysis report

Static analysis result for SHA-256 249fd41b7e440b62…

MALICIOUS

PDF

43.6 KB Created: 2020-11-02 08:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4f77a6cc9b0206aae638c7077fa968 SHA-1: 1e8fca99e142c5e21adca7f1e42f30e4e3c3f853 SHA-256: 249fd41b7e440b62b5d8e1ec5c22b0bdb21c59edca9bbd88735ac03c293b1f1a
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/123?keyword=forecasting+the+weather+worksheet+answer+key
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f99058f129d7.pdf
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f944506c3190.pdf
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5f98757b70969.pdf
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5f97d78a2d9fd.pdf
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5f9cfbc723a75.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dedinavesute/formato_para_certificado_medico.pdf
    • https://uploads.strikinglycdn.com/files/a1252435-b897-475d-8396-b81cf003a030/jaririgate.pdf
    • https://s3.amazonaws.com/lixuduwonifa/xedegezokinuwafog.pdf
    • https://s3.amazonaws.com/dabatisew/80214589353.pdf
    • https://s3.amazonaws.com/wiwuxot/present_perfect_already_just_still_yet_exercises.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/download_bukhari_sharif_in_urdu.pdf
    • https://s3.amazonaws.com/mubefula/greatest_common_factor_worksheets_grade_4.pdf
    • https://uploads.strikinglycdn.com/files/bc7a8cc6-ec2e-42e5-b581-48bb402ade3f/mukutugobimolexat.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_off0000690e.bin
0fa221689ec548c9436323a2eb7631e4c99b16d2af1a981b7ec950a60df4c656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 5240 bytes
font_01_sfnt_off00007afc.bin
d16132afb60dfbf76b7beaee11c12130aed332f8756b8bed9c043961b66b9ccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 11096 bytes

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