Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ba56ade5b2bdc7…

MALICIOUS

PDF

40.9 KB Created: 2020-08-27 16:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95eccdc97b9242feaa1076db76eb258b SHA-1: fbac1be5a771953e006392c526d46cafd29441b6 SHA-256: a7ba56ade5b2bdc743898c9fb4e77d7d18502d2bdac9f61f90dcb7015f2a5fba
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/pify?keyword=dr+larry+van+such'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'Dr larry van such', suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious behavior observed is the redirection to a potentially harmful URL.

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.me/pify?keyword=dr+larry+van+such
    • http://pitotexu.karenhaugen.com/uploads/1/3/0/9/130969744/wivufifusoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/0436/9816/files/83644894317.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/b_d_burgers_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2531/files/c_random_float.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/roxiw.pdf
    • https://cdn.shopify.com/s/files/1/0462/4433/1680/files/abc_australia_tv_guide_png.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/81760111606.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9668/files/93672924406.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/92573802017.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2303/files/57079034562.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_off0000636e.bin
89f5aaaf32229f7238eacbab6c9cf38b5da6b4e6ced7d03402156b669e5ba4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 5048 bytes
font_01_sfnt_off0000749d.bin
b0ccd8cf6af06abf6175ce2b801341aa67fc0c178ff4c2dbdf6b62d218b309af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749D 10280 bytes

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