Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecd4c39e0291829…

MALICIOUS

PDF

48.7 KB Created: 2020-08-17 05:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac6e2db25a8e940b2d013bb0d8a3567f SHA-1: f6f82bf068f7fd458ba3142bd833bbff7a049e37 SHA-256: 2ecd4c39e029182931ef8f9a6d6fc48195ab79779cfdb920feb288aab6fbe79d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary URL, 'https://ttraff.ru/pify?keyword=aakasha+ganga+songs+free', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or phish users. 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.
  • 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.
  • 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.ru/pify?keyword=aakasha+ganga+songs+free
    • http://files.boonecountysolidwaste.com/uploads/1/3/1/6/131607635/0bc785.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/46729938217.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/8238355537.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/fixozeruvekexajadaniji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/87111734799.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/50699361780.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/digital_logic_boolean_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/australian_groundwater_modelling_guidelines_barnett_2012.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/amadeus_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/86867611717.pdf
    • https://cdn.shopify.com/s/files/1/0440/6060/6616/files/cookiezi_osu_skins.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077ef.bin
5d814bedfb58300d90bd57adf96a51b37884b7dbb71f2e16329c76441f94df5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EF 5048 bytes
font_01_sfnt_off00008914.bin
f7a7d651bc97bd59b66c089148c83794d42aa6e1c19cfb90764d3eb67e664170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8914 14688 bytes

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