Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fd1cee386e86cc…

MALICIOUS

PDF

37.6 KB Created: 2020-08-29 18:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f46c6174569fba63f1fd44dfcab06b9 SHA-1: 517496da42a493538ed2eb4f9161055c8f2f9840 SHA-256: b8fd1cee386e86cc26c0dd1ff94f47713e64c94bcef2930ee5350f3131fbaf6e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains references to a product and the malicious URL, suggesting a lure to entice users to click the link. The presence of a large number of embedded links, many pointing to Shopify, indicates a link farm SEO strategy to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sony+bravia+850d
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/33474337652.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2710/files/52501309147.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/gisexibawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/sapod.pdf
    • https://static.usrfiles.com/ugd/b8c837_dca248b2fdd34075aa563d43fe792528.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f640f340c6440aaa326855df987f29.pdf
    • https://static.usrfiles.com/ugd/b8c837_64a79ded2e114481a1cf6f2342f89e14.pdf
    • https://static.usrfiles.com/ugd/b8c837_9eace22d32914984a2f7a99007a56742.pdf
    • https://static.usrfiles.com/ugd/b8c837_04f5f48ba3c547f8bc0aa6758eec0ba4.pdf
    • https://static.usrfiles.com/ugd/b8c837_08f0f523af7e4aa1b95e8842346b362b.pdf
    • https://static.usrfiles.com/ugd/b8c837_463de93d2f4c4289be6300a96b299f5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a29c0173d06040b0b845b4705acdf5d5.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_off00005376.bin
dff136b2f988bb3750f383f0b83e64165e4e20282f7bbdaca2bd207107549c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 5472 bytes
font_01_sfnt_off00006623.bin
d7b317ad77c3abc35d0395108ea19293d488a02dbd65772d7e14399af0f416ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 10484 bytes

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