Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b75bb1d2b503f33…

MALICIOUS

PDF

33.6 KB Created: 2020-08-31 16:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c12a5ec900d5e48233588b47cb215db6 SHA-1: d2d3cd84d716e65a1c8a8daa7a1b3396a5bc4342 SHA-256: 1b75bb1d2b503f336eed3a55a637379f9a5ba7f403d10c1e7ecaa66c93652a25
150 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, pointing to 'https://ttraff.ru/pify?keyword=apx+6000+radio+manual'. This URL is presented within the document body, disguised as a manual, indicating a social engineering lure. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=apx+6000+radio+manual
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/gaddis_java_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/64643628298.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/40768110867.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5eb673b6412452e94fc6eca72eff72b.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf05ce16c7674097a1f1da5467c5178b.pdf
    • https://static.usrfiles.com/ugd/73cb9e_50e0cca7a85f43f0bb8331a940edf065.pdf
    • https://static.usrfiles.com/ugd/b444d4_eec318622412458b81011ac5ed7928a9.pdf
    • https://static.usrfiles.com/ugd/cafc24_5b944f48b73a4152a590bd8752ae7d42.pdf
    • https://static.usrfiles.com/ugd/0779a3_febd650770ec4402acb6acdee716aa9c.pdf
    • https://static.usrfiles.com/ugd/26481d_59028802d4774abcb7b99d47b6d5a980.pdf
    • https://static.usrfiles.com/ugd/9904c2_99da680747864c699a8559c29f41b371.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4abe030a28849f59177128ae9d76235.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb1c2cc5fe0c464d98a326934d4d392c.pdf
    • https://static.usrfiles.com/ugd/9757e7_a4d89b94e6784d74a2f6e6d7624d3816.pdf
    • https://static.usrfiles.com/ugd/0789d5_1187b804f1404ac081e59a47e25a767e.pdf
    • https://static.usrfiles.com/ugd/97aff7_2d788e3fb0594b40ba86aca72e6a27d8.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_off00004996.bin
5370b162772d431e2912a838b3cb8a1df028d639ae619158488745e807fcc14a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4996 5280 bytes
font_01_sfnt_off00005b74.bin
4709443757a4ce705dfd813947a556266d84e18b81bd31524fbb582b30a3d752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 8932 bytes

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