Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c466491c7a524e4…

MALICIOUS

PDF

98.4 KB Created: 2020-09-16 02:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e74309764edb9d4ffc03744726d322b1 SHA-1: 2023f7aef35eedf5e018ac585a71a0dee25beace SHA-256: 5c466491c7a524e47c0f5b0aec62775b610470d0187faf3816c2b90225347d8f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.club/pify?keyword=larry+pv+riles'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm designed to distribute malicious content or traffic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/pify?keyword=larry+pv+riles
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://jobenip.thetailgatist.com/uploads/1/3/1/0/131071157/2516806.pdf
    • http://porezoma.narrowgategraphics.com/uploads/1/3/2/7/132740185/gewuxalevutore_wukip_vesugasiba_jevadabo.pdf
    • http://files.leahbealdesign.com/uploads/1/3/2/6/132695535/3659919.pdf
    • http://jivolizo.sosquaredaway.com/uploads/1/3/0/8/130814229/b957efb.pdf
    • http://files.aardehondborderterriers.com/uploads/1/3/1/6/131607374/2673713.pdf
    • http://nepebesu.jackiecheuvront.com/uploads/1/3/1/4/131437615/4268760.pdf
    • http://kesosufev.faithcomethbyhearing.net/uploads/1/3/2/3/132302855/zixaliwemime-sewijikiw-koxajaxuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/gavalolagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/97539556882.pdf
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/boaters_licence_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4471/files/gadidotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/gazelaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/48475406174.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001393c.bin
940f7000454f433d89489abe4ac082dc7273b693d3ff01d16c345159e9e07288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1393C 4408 bytes
font_01_sfnt_off00014845.bin
0223286adbf6ca33cb8224ace2a0ea4ea67b172e336cf7667d85e933e5347bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14845 12004 bytes
font_02_sfnt_off00016e8e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8E 4324 bytes

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