Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd18ad4146ca844b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 19:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75fc222cb6d03ddeeec59a7f4e6c4790 SHA-1: 3234a1c2510b1e446281370c29852b8f8e622ade SHA-256: cd18ad4146ca844ba57f59db1e928ab2d486ad5a48b62444ca93e4713ef5b79d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=omar+epps+gif, suggesting a potential delivery mechanism for further malicious content. The document body is heavily obfuscated and contains what appears to be junk data, further supporting a non-legitimate purpose.

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.ru/pify?keyword=omar+epps+gif
    • http://files.priorityonesurplus.com/uploads/1/3/0/8/130874358/vozotokujirabanun.pdf
    • http://files.citizenstoabolishredlightcameras.com/uploads/1/3/0/7/130739919/7df9632e918c374.pdf
    • http://files.calvarychapelsaintcloud.org/uploads/1/3/1/8/131856827/solijutamixof.pdf
    • http://files.continuumsofservice.org/uploads/1/3/1/6/131637498/jijeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/20980851704.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/kuxajalegum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/xefesavivunotege.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/46664292758.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/95294525891.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/89288513227.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/dunajewobosuzusonegexeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/24583722548.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokisesuzarutaxiwiru.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/vomajuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/kixelitumefedemefima.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/99161375074.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_off00005f5f.bin
6d2086295078679098811b97c4cd70139f3eaf3f575d4b8c5b7ba44a9d8fff43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5F 5216 bytes
font_01_sfnt_off00007103.bin
fccb5ed42a179dc7928f7db8c66160fcad3b39c0254f0866e5bfc3160f9dc2e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7103 9948 bytes

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