Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba9b94cae5a5198…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 13:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6246696a667087a61cb03177166b1941 SHA-1: c41c68e16d6c0bb7a62de0eeaa0fe8aa816b602a SHA-256: 9ba9b94cae5a519893df4e6c48ca9a26e87a69b2fcb08bcafec249f20ac648d0
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing for a PDF link farm. One of the primary URLs, 'https://ttraff.com/pify?keyword=brusher+regular+font+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDF files hosted on various domains, including shopify.com and custom file hosting sites. This suggests a campaign focused on SEO manipulation or redirecting users to malicious content.

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=brusher+regular+font+free
    • http://files.marketplacecreationsdiy.com/uploads/1/3/0/9/130969080/nunobepiluvo-tetibofo-sabiz.pdf
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdf
    • http://files.peytonsocietyva.org/uploads/1/3/1/3/131398046/8974281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/javascript_append_child.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/37253547078.pdf
    • https://cdn.shopify.com/s/files/1/0437/1120/1435/files/56003517787.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0524/files/5307081189.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/kemesotudugewapafeniwevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4223/3755/files/berger_paints_exterior_colour_combination.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/tebejuzidazixajerotuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/11849643234.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/76010130310.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/wg111_v3_drivers.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_off00005e14.bin
d54507f07c8a50b24dbeef04f8086b2c329a537758decc8899e5aa4a8fed0950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 5076 bytes
font_01_sfnt_off00006f56.bin
404a977fecf8df5cf41397b012db9492e953cce5907fa34e3773e25af574ac2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F56 10260 bytes

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