Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c8d0e240474e1a…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 02:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8865466e7ec4d255ca76f686b1472286 SHA-1: 4ec60cbcedbbcac65a4a1e517da7a932a3060ced SHA-256: a2c8d0e240474e1a92abea191f6d0e219b18424b46a1752e1cde2647647fef7d
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to user-generated content, suggesting a tactic to obscure malicious activity. The document body contains obfuscated text and a URL that appears to be the primary lure.

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.cc/wix?keyword=osrs+smithing+guide+blast+furnace
    • https://static.usrfiles.com/ugd/b65acf_f213d3e2aeea49c490bececc0c77a91d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c762cac771034d9f9681d8e751bb0e0c.pdf
    • https://static.usrfiles.com/ugd/7041e4_e218f6db314c45638004bd5ee338d84a.pdf
    • https://static.usrfiles.com/ugd/b8c837_39d101f5df8f412494bf6d202484333c.pdf
    • https://static.usrfiles.com/ugd/3bca44_a60dd0a4161f4af291e5bfb4baa8fd32.pdf
    • https://static.usrfiles.com/ugd/704566_e4eaff9a5eb046de93d97ea6e79949c0.pdf
    • https://static.usrfiles.com/ugd/7ff653_c8eec5ee96254a94a15ba8398f69cb55.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/87701404037.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9208/files/christmas_getaway_hallmark_movie.pdf
    • https://static.usrfiles.com/ugd/b8c837_7093ddc8f9744b2aac5c360e0eaceeec.pdf
    • https://static.usrfiles.com/ugd/8cbfce_e84e087157f64916addc8d10341df99e.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_off000075b9.bin
4ba9eb24b423c6d270dda7ef4b1c2f53807f9c62a46c4a28bae5dc88c17ee068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 5600 bytes
font_01_sfnt_off00008891.bin
4caaa9e3140f5f7e862741134b41694b0406b798705224712e40f06f9135755f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8891 10224 bytes

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