Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5db6b3721c94f0d…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 14:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855e24f4116b4486f4c23738f056d597 SHA-1: ce265c595709ef99ab72fcfbf0ba53f8efc12cff SHA-256: a5db6b3721c94f0d074a88f77540ce329eceb730cc3f281d70265cfb976fa732
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is associated with a lure to download 'atube catcher 2016 baixaki'. The document also contains a PDF link farm heuristic, indicating it is designed to host numerous external links. While many linked PDFs are benign, the primary redirector is flagged as malicious, suggesting a social engineering tactic to drive downloads.

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/wix?keyword=baixar+atube+catcher+2016+baixaki
    • https://static.usrfiles.com/ugd/b8c837_3e866402209b4a83b948a68f0bf0a07d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3849cf880a9d411e869eb4303ccdca74.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_0901f0e472e94248a7623987149cda23.pdf
    • https://static.usrfiles.com/ugd/b8c837_656ce08bdef74d79b041bd03c11c0ef3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7375bf5902ba48098054adb10749c277.pdf
    • https://static.usrfiles.com/ugd/b8c837_0db9ade3fb8a4bf696c58fb475f2e1d0.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/38430906031.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/zogatiweruvin.pdf
    • https://cdn.shopify.com/s/files/1/0457/6700/0230/files/xanijufavipisosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8688/files/tavazojiledosavezawesano.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_off0000615e.bin
1a3186fe8bec3d678b4762714c094e6ac5426e284d6da527c4d180f32d2441c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 5476 bytes
font_01_sfnt_off00007402.bin
a5d86cbe3da64970f4dade38a8cf9d7f8ea0765144005deefff9c330633e1d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7402 10248 bytes

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