Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd717ec9c2d35ab6…

MALICIOUS

PDF

43.5 KB Created: 2020-08-02 09:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70950787e93927c73c6cd0ef0e9b880f SHA-1: db154cec9c604ce3114e4f9b94f6260d43c9f279 SHA-256: cd717ec9c2d35ab6f851c9cf6cd0c694a879052d8238a8fceef7355e5c7d7c3a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external resources, many hosted on Shopify. The document body, though partially corrupted, contains the phrase 'What is a readme file' and the malicious URL, suggesting a lure to disguise the malicious intent. 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=what+is+a+readme+file
    • http://files.donnahavens.com/uploads/1/3/0/7/130738700/5927160.pdf
    • http://files.kenreadsjyotish.com/uploads/1/3/0/9/130969402/vevidoxomufifelu.pdf
    • http://files.allykeast.com/uploads/1/3/0/7/130775653/kukebobegavudu_lanekog.pdf
    • http://files.quartneibrown.com/uploads/1/3/1/0/131070846/notof-fiduf-lorusuvivujoke.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/vupunumefotafuzexox.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/11835367165.pdf
    • https://cdn.shopify.com/s/files/1/0434/3463/9522/files/xabijenuremurur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0434/2729/9478/files/tubolozipiraseforumix.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/josujipadugotidipidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/fukon.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/jifafusomizofuvazofelonaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/7863318679.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/jojugusaburaxebisid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/25265618805.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_off00006b5e.bin
7e91b5393ab223a42f828afd3c136785f8cf3959719c4d9b2a48859927757e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 5160 bytes
font_01_sfnt_off00007cca.bin
5137445436fa42cc74dbabeef60154e659e3c0653ebc7665341da035d578e559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 10708 bytes

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