Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3ae6cac6854f23…

MALICIOUS

PDF

35.2 KB Created: 2020-08-23 17:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77e38fd13ac8e4a844ad248aeeb3b485 SHA-1: 9366afdd7e945746c83977016f511c7e71b11b13 SHA-256: 4c3ae6cac6854f23bc1d113763724e42aff6b9b23011dbffcb9fae74525e0b28
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bad+boy+video+song++hdyaar'. Additionally, a PDF SEO link farm heuristic indicates the presence of numerous embedded links, with 'https://cdn.shopify.com/s/files/1/0431/4228/3432/files/integral_calculus_feliciano_and_uy.pdf' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to external content. No scripts were extracted from this sample.

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.cc/pify?keyword=bad+boy+video+song++hdyaar
    • http://lawul.songsandmemories.com/uploads/1/3/0/9/130969465/2402917.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/integral_calculus_feliciano_and_uy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/38201160897.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/ancient_greece_map_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/raxuzanubivozolinotuje.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/29443892317.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/domestic_abuse_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/schrader_pneumatic_cylinder_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/carcassonne_expansion_7_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/69582647515.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_off00004c2f.bin
113ffa68ce0923103a8736081e68b9187b63b50aa8949ac8721a76b8c60ddfc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2F 5404 bytes
font_01_sfnt_off00005e8d.bin
ed95eb94c058d786d0e25eb6783c9734420bf1fc5e955af4aaa2caa434ea3167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8D 9980 bytes

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