Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b47bb36bc84f4d…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 06:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a071c5b3e7a5f405559a4a5a43d7a15 SHA-1: c7a4b4cc787f877c9b59bea938e31b62940f3b3a SHA-256: c1b47bb36bc84f4d812318668ea3b66ea495b29207e01358be5d3b943d085166
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM indicates the presence of numerous external links, suggesting a tactic to manipulate search engine results or distribute malicious content. The embedded URL https://ttraff.ru/wix?keyword=dirsekli+talep+e%2525C4%25259Frisi is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this URL and references to wkhtmltopdf, suggesting it was generated programmatically.

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/wix?keyword=dirsekli+talep+e%2525C4%25259Frisi
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/summoners_war_lyn.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/96698382283.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/sewakanepeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/attestation_formation_7h_125.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7045/files/aligarh_full_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0428/8485/8022/files/pusexafojawudani.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/43656826193.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/mikizij.pdf
    • https://static.usrfiles.com/ugd/18f527_cd046dc680d0442ebbfd143b9725ef21.pdf
    • https://static.usrfiles.com/ugd/a59130_e4cf5b0a78de4f5f8042f49978e16187.pdf
    • https://static.usrfiles.com/ugd/6cfc61_a985e391019d48beb81444597ea642d6.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_off00004d9e.bin
8867aee09656eb7cbe47bf94dcf3108c042584788322dae6dcd05179ac0ce999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D9E 5104 bytes
font_01_sfnt_off00005f0f.bin
c0135b5e44fa72e951a44fa5912711c346d443c42a2b639f35fd6c6f8dd4ae0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0F 11396 bytes

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