Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ed05dd011fd34b…

MALICIOUS

PDF

48.9 KB Created: 2020-09-01 00:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf0e5abf88c7237253a3c4caafcee72 SHA-1: c851551059a093f2f3d4b1c3b515b73fe348c0d5 SHA-256: 89ed05dd011fd34b1e0bd8e097ce9607afb9495cb20ff596f29f3bf129d30f15
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing campaigns. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=calisthenic+movement+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious content. The file also contains a large number of links to external PDFs, likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=calisthenic+movement+pdf
    • https://static.usrfiles.com/ugd/ca9b0a_49699747c6e647cb89b34442aeb25a06.pdf
    • https://static.usrfiles.com/ugd/b8c837_743a26bed5e847c9bbbd96eeb19aa4b5.pdf
    • https://static.usrfiles.com/ugd/bfbc46_eabb8071d77d4232ae03e4c76e32da45.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/27191523051.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/fisicoquimica_gilbert_w_castellan.pdf
    • https://cdn.shopify.com/s/files/1/0435/3612/2008/files/nadekufumawidemasab.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/60378625743.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/4178153464.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6496/files/airborne_radar_beamforming.pdf
    • https://static.usrfiles.com/ugd/b8c837_a55c3657c1c346ceb08a8fe36e0100b7.pdf
    • https://static.usrfiles.com/ugd/52b593_2d3bdd1e7f1b4c1f8cafbb08273cec45.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072d3.bin
e826f3cc71958c4bd752177b6d725bdbfc6b7c7b6050670317a5d2afae160cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D3 5264 bytes
font_01_sfnt_off00008495.bin
653f61f74aa9e8a729509f02b4b720bc6c04a82a34011ebeaf49bc12578a6f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8495 4064 bytes
font_02_sfnt_off00009328.bin
52c2f8ca619ad39030879e93e45e00017809b17b03bf3245343317971b471824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 10504 bytes

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