Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1da7ff4ee3e170…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 12:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6906c73ca8f5d0a3285ddaf1fbc488cf SHA-1: c3571c36e908d9c2cfe733a6a14ba699b914fd04 SHA-256: 2c1da7ff4ee3e170aebbbe742f35b442670f5fd3757b2ec7cacf17fb068d1bc3
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=pcl3+electron+dot+structure'. This URL is likely intended to lead the user to malicious content. The document also features a large number of embedded links, many of which point to external PDFs, suggesting a link farm or SEO poisoning tactic to attract unsuspecting users. No scripts were extracted from this sample.

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=pcl3+electron+dot+structure
    • https://static.usrfiles.com/ugd/b8c837_f2dd31e295c840e3af053e1176413e6c.pdf
    • https://static.usrfiles.com/ugd/33a2e4_261ef3d1e17840119b0ced19c960daa4.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc8091a11cc645159ed799d1fd4e3545.pdf
    • https://static.usrfiles.com/ugd/bae363_416784cd1a314241bb7c23fe9975522a.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/xamufadabolototebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/analytical_chemistry_notes_for_bsc.pdf
    • https://cdn.shopify.com/s/files/1/0444/6447/2231/files/resoluo_cnj_audincia_de_custdia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/piromuzovikudegut.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/wedding_background_pictures_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0783/4272/files/puwipadosasa.pdf
    • https://static.usrfiles.com/ugd/6350c7_58eca1a9794d4a82b74fde5c2dbaf3a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ae7500b4a6e419fb4371d4f923e6e19.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.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_off00005473.bin
a5e18005bfaf7c574f68c738e32fa69970f4967a8ee3d01ed1ce97b3bab349cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5473 4888 bytes
font_01_sfnt_off00006512.bin
403e6f948a1a567d1cc6c81b334b6bf8d48ebf29490704ea7472d39a7a590b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 11068 bytes

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