Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f23558804b6af9…

MALICIOUS

PDF

30.9 KB Created: 2020-08-22 09:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77d3c49964e5e0bd51463982e98a3d60 SHA-1: 1435ad0369041fbbeb5f3d3b067352f9ab00f9b4 SHA-256: 53f23558804b6af97ad6afe0b46d4fa599be7d2eaa50cac3b8aa2068fe580317
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=bajni+payaliya+lado+piya++mp4'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on shopify.com. The document body contains the malicious URL and several benign-looking PDF links, suggesting a social engineering attempt to trick users into clicking the malicious redirector.

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.com/pify?keyword=bajni+payaliya+lado+piya++mp4
    • http://kotusik.cottonbrewing.com/uploads/1/3/0/8/130813765/zadudagevawafo-koburusogol-lowuzoresiro.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/best_architecture_student_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/78779379944.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/23862960482.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/min_to_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0431/1636/3927/files/rebapev.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/fosibakadajemoxemewim.pdf
    • https://cdn.shopify.com/s/files/1/0439/0086/2619/files/65574636886.pdf
    • https://cdn.shopify.com/s/files/1/0438/4676/2656/files/50627813997.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/white_blood_cells_function.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_off00003f23.bin
3b4b39d5269b2b5196d1e7d0e44af03f131f02405c94759ddea4b9d6821cc9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F23 5148 bytes
font_01_sfnt_off000050a3.bin
a32b98065f798f35142a3ec5d4bf0c65f5c542f0ab37350dbdee6ac81f28845f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A3 9076 bytes

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