Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc980a349d24ab3b…

MALICIOUS

PDF

49.9 KB Created: 2020-09-06 15:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c723ea96acb33d2b74d0983f7a2b89c SHA-1: a535ad331d890be6b5cb5924e95f61a05b361a99 SHA-256: cc980a349d24ab3beff3f64143a67d3434a598f9b408b28ce1130f5d4503f7a6
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=cardanol+formaldehyde+resin+pdf'. This URL is likely used to redirect the user to a malicious site. The document body also contains this URL, suggesting it's presented to the user as a clickable link. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector.

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/pify?keyword=cardanol+formaldehyde+resin+pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/vetemidetixojatopuxowome.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/22204624398.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/vedovepujow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/xumazemexekutuxefelaposib.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_28b73ce2ece34d01bb8875082340d4bd.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/30979846227.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/62473479991.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/outlook_signature_location.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/97208353136.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/bezapejomomovamoju.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/85969658212.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_off00008458.bin
6d24d2dbb28ee6f6ac3419b1eb0b76f109bc6ca456a8882fd4ef1d163bbb64a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 5288 bytes
font_01_sfnt_off00009631.bin
846cd5db9bcdc710bd861f742ba47d13ed738e22929a8e8ff160eb6a3bd8d1fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9631 10620 bytes

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