Malicious PDF — malware analysis report

Static analysis result for SHA-256 8801e93f69c7b0e9…

MALICIOUS

PDF

42.5 KB Created: 2020-09-01 03:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723223e736c75400399418d095868c14 SHA-1: 4fe60531f29f968e5ec697d97ff2b799521e28da SHA-256: 8801e93f69c7b0e94b3fdec22a602be6899b779c619698b7159ce684699c9215
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=best+antivirus+spyware+android'. This URL is presented within the document body, disguised as information about antivirus software. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are to Shopify-hosted PDFs. The primary malicious URL is the most significant IOC.

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=best+antivirus+spyware+android
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/jizeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/51338295727.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/meme_generator_apkhere.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/elementary_probability_theory_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/application_for_leave_form_csc.pdf
    • https://static.usrfiles.com/ugd/f4de5e_ced0181ecace408a8d026febd645e876.pdf
    • https://static.usrfiles.com/ugd/98e298_60e0ad01c45745bebf33c1ec93bc7660.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_005bcfcebef0495a88cb0e9b321afbfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_75a434bea9084e5ca4fdfe3bb1499848.pdf
    • https://static.usrfiles.com/ugd/3e9e83_b843d309f7f743b78398ff7b6020aab4.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ffc76705b449a68b205ae302f29177.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
    • https://static.usrfiles.com/ugd/913720_ddf78667a2cd4e89bb8f14ff499e7d6c.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_off00006833.bin
877c7270c0888587a3b17234d8e82b10076da6a5c02e02836bbf699e6d1b0280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 5224 bytes
font_01_sfnt_off00007a26.bin
17f2eac3c2d620b2b8cd921d48f961b7aec9cd35d539a0722c7e4c6abd9fb522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A26 10196 bytes

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