Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7392ea104e07c9a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 19:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bc0b521d060562ae385a2b45d477b7b SHA-1: def143f2dab072fd543a5232fe0923a8f2b3abe6 SHA-256: d7392ea104e07c9ad04fdb282283d964170cfe4931cd7193960b13bd8d312ae4
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. This redirector, 'https://ttraff.cc/wix?keyword=doyu+8+ball+pool', is likely designed to lure users to a malicious destination. The presence of a large number of external links, many pointing to static.usrfiles.com, suggests a link farm or SEO poisoning attempt to increase visibility and traffic to the malicious redirector.

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=doyu+8+ball+pool
    • https://static.usrfiles.com/ugd/b8c837_70490599269c45bbac3dd4ae3472f5b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c745da03750044f99e6ccb6407b391d2.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_8856c3c87a0e4f5a9ed8178b4b4c08fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_269a0ae271c24819a837d7c986639da6.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbc5d4d42aef426d9b0325a200230972.pdf
    • https://static.usrfiles.com/ugd/5be868_a665a87fac32490099287e27afba432a.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_6f33c397194f41f293c2ca88201b1d67.pdf
    • https://static.usrfiles.com/ugd/b8c837_83f0769e4102485a8a3e32a7e1e7d435.pdf
    • https://static.usrfiles.com/ugd/accd1f_d5b6b0053297482185a4c168b48d874b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d77737b94d848dcb854940b484f6258.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2f8857696894392adabc3596ea7c27c.pdf
    • https://static.usrfiles.com/ugd/73f3b0_e4ab25b6cb8b4831acd95efb4d330fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c33b2911070047f5bcef2f751b8f7695.pdf
    • https://static.usrfiles.com/ugd/8a419d_ae8418c76f2c4072ac722c7cdf0285f8.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/
    • https://static.usrfiles.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dea.bin
ffcff59f7e5956e0f48e5cb48651ad355f07be6eb07d2cab0a645456a2fe78cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEA 4976 bytes
font_01_sfnt_off00006eed.bin
7b41da36f442c2c0449bbe6970a2874e30a573f1cede16b08a3fccb4ef1eb345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 10584 bytes

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