Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8b817666d67114…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 02:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9498dadfeebea3a9bd7ed3bcc8d14f63 SHA-1: f092ba7269cf03305fbb960e717dc995069eefbe SHA-256: ca8b817666d67114c693f23d70354ef22588cd6af714dfbc713f51378c9e4de1
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=3+place+de+fontenoy+75007+paris'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0463/4145/6029/files/betenasolexuz.pdf'. The document body, though partially corrupted, also contains these URLs, suggesting a lure to external 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.ru/wix?keyword=3+place+de+fontenoy+75007+paris
    • https://cdn.shopify.com/s/files/1/0463/4145/6029/files/betenasolexuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/jezusosimedobeduxusefoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/logo_quiz_ultimate_answers_level_41.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/bhu_bsc_entrance_syllabus_2020.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a61fc3bb1214983a4047278be7b03db.pdf
    • https://static.usrfiles.com/ugd/f6a907_4f4924b587634c298f674966b82b8bdf.pdf
    • https://static.usrfiles.com/ugd/77d535_eb9f726b5f5f4e8c871b3c46f1cabfba.pdf
    • https://static.usrfiles.com/ugd/dc98cc_027d912b1ada45f2ad0596a0eb33d6c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f5f02556bc54717b8328048df782305.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/jitagoxinowetiwuzujukurar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/rusitaxufi.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_off00004b6b.bin
1c832e61c990f71bb0c0771fa41f2bcd9daa41ead716063f90e045908d6ddd96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6B 5668 bytes
font_01_sfnt_off00005ecc.bin
93587f287c47b1b58f71b66c71593d598247e457048bc908d781c21a19a6d315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECC 11312 bytes

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