Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fbdc1c9d47e20c…

MALICIOUS

PDF

44.5 KB Created: 2020-08-27 23:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ce000178ce832e65d9ca79cddb73377 SHA-1: 02459ea926affda9830a60ed9a8b4a047f3d801f SHA-256: c4fbdc1c9d47e20c00c4ad8a3cef4d27ca519401e2f714f17a453a6fd2fd2740
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.ru/pify?keyword=los+hombres+por+desgracia+siempre+vu. The document body contains obfuscated text and a reference 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/pify?keyword=los+hombres+por+desgracia+siempre+vu
    • http://files.sbwga.com/uploads/1/3/2/6/132695829/7282129.pdf
    • http://files.indesignz.us/uploads/1/3/0/7/130739081/zotaropipaz.pdf
    • http://suverid.cyclebavaria.com/uploads/1/3/1/4/131438044/87501fa7cd5fe6.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/boxoxuxibegoxom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/delhi_bus_numbers_and_routes.pdf
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/physics_james_walker.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/wodowunakibab.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/81409394228.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/animal_world_full_movie_2018.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/xarufapupiraladilixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/30538142426.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojav

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8a.bin
5a467e21f28c84fdd3ab45c9377a106a7787bb4bd7a86f5cddaf679b39471417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5596 bytes
font_01_sfnt_off00007d70.bin
e65a5f3ebcdd922035a885b2d3533ea7690e830641233fd69cc1d814a4c022dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 11720 bytes

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