Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e491970004a6256…

MALICIOUS

PDF

51.7 KB Created: 2020-11-01 10:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e97f042db5f963905672eea1a9ded4c SHA-1: 5805f4fca4786766b6c2fe82f22c76cc6dec71fb SHA-256: 1e491970004a625658c7ee4aa8213ccc0355842a975b81e0802aa5c30f2037f8
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful destination. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

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.cc/123?keyword=la+moda+mediana+y+media+ejercicios+pdf
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f93f369b825f.pdf
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f8e7ec0768b7.pdf
    • https://cdn-cms.f-static.net/uploads/4425726/normal_5f99aa0b66974.pdf
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5f914a9a835c6.pdf
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f9b73ad53618.pdf
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f9d9a4359823.pdf
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5f9e4ab14c5f9.pdf
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f88b716e2ac3.pdf
    • https://cdn-cms.f-static.net/uploads/4378152/normal_5f8bc5d763801.pdf
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5f977d3f33f0d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kudefem/85597420653.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007222.bin
6c215e6f7e20e492b42426de949feab5006820386ae220f32405e9625ed88e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7222 5388 bytes
font_01_sfnt_off00008473.bin
45fc1746d7cbd90a2ee23cf77f443b5a79a8904c9e4d6c00629d5a405fd85f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 12812 bytes
font_02_sfnt_off0000acad.bin
61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACAD 16096 bytes

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