Malicious PDF — malware analysis report

Static analysis result for SHA-256 4992c5e713a02a83…

MALICIOUS

PDF

88.5 KB Created: 2020-09-08 15:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6525933b320f3d0e22496c5c21ee458f SHA-1: ebdebd57ef56da1fa2711afd80795541e456ac4f SHA-256: 4992c5e713a02a83ef02e82b89401932f96f815a6e7c1ac0fe8d0520c3353edb
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://ttraff.club/wix?keyword=e+coli+bacteremia+guidelines'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking it. The presence of numerous links, many pointing to Shopify, indicates a strategy to obscure the final malicious destination.

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.club/wix?keyword=e+coli+bacteremia+guidelines
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/rabupasoladiziv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9488/4000/files/design_and_analysis_of_algorithms_levitin.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/toridijoxaxexovoxaxuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/jusedawasanusukibujabip.pdf
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/fasavekewigivososu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/wilowewuvamelutoxurigezaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2331/files/benewoseve.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/banner_design_psd.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/53068957201.pdf
    • https://static.usrfiles.com/ugd/b50c55_77f5cb0e3c874bebada47fd811679fcb.pdf
    • https://static.usrfiles.com/ugd/c2007e_ea0cf4f1c91c448c8a90cb389cf42cb2.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_off00011dae.bin
2c4b8667b079aaf3c620fde7522bddf048f05e46092772c8dc14278c58d29fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 5356 bytes
font_01_sfnt_off00012fc9.bin
892107ef3be36321b9e1e5eb968b70f26f6f16e15802257d88494bb7f3d54ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 11140 bytes

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