Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19ce4bac9e6d0fa…

MALICIOUS

PDF

39.6 KB Created: 2020-09-02 11:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7257f2c10d481a1dfa119350a97255d8 SHA-1: 2cf26305afa30ca73493a210e06e39f93edd0ae9 SHA-256: c19ce4bac9e6d0fab8fcfd7131cf4694a5c398a371c138059d7e600c1ee7171b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify and other domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.club/pify?keyword=bz2+unzip+android'. This suggests the document is part of a link farm or SEO manipulation scheme, potentially designed to drive traffic to malicious sites or distribute further malware. The presence of numerous benign-looking PDF links alongside the malicious redirector indicates a sophisticated attempt to camouflage malicious activity.

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.club/pify?keyword=bz2+unzip+android
    • https://cdn.shopify.com/s/files/1/0463/2985/6155/files/6664688055.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/eye_roll_emoticon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/current_affairs_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/calligraphy_cursive_writing.pdf
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/68443686469.pdf
    • https://static.usrfiles.com/ugd/277b62_c64f2ab7eeaf45e4a839845240bdb908.pdf
    • https://static.usrfiles.com/ugd/0c4177_159baa3400af46e0a415ab2e951744a3.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_3a22f3ebc22e453894389a5ab891d71d.pdf
    • https://static.usrfiles.com/ugd/957c7b_bf4d49c00a67410b86389dc1aa5c61d2.pdf
    • https://static.usrfiles.com/ugd/5cf23b_c7892cb27c67479f84008c4259ae7a70.pdf
    • https://static.usrfiles.com/ugd/4c1554_e06494c198014dd6999c06c87c096ec3.pdf
    • https://static.usrfiles.com/ugd/30ea26_b0161c36b65b456c92f849a2080f3faf.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_off00005e59.bin
929cd4c9568f75489e950cf74bc56521c8651816f77a50c0aac3bba3478a1bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E59 4976 bytes
font_01_sfnt_off00006f5b.bin
3cab0283235604326235f177a1afbd477483cd98213628fa26761a9903e10003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5B 10356 bytes

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