Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd96c7b840a299b2…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 05:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a9c4ed6f4cc88c2bebaa2ac275d367f SHA-1: 8ca8e07bb2c618563c03f35bd13b1097edf4fcd2 SHA-256: dd96c7b840a299b2c0ab4cef9d320f7839ac2fbe54abd6168747838e292474ff
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful website. The presence of numerous external PDF links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the primary attack vector appears to be the embedded malicious URL.

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.com/wix?keyword=are+viruses+alive+worksheet+answers
    • https://static.usrfiles.com/ugd/b8c837_545b203e077f4949b197755b78cd63af.pdf
    • https://static.usrfiles.com/ugd/868401_6fe153758b424bb18a6fa7f4a6ce9975.pdf
    • https://static.usrfiles.com/ugd/b8c837_dacb405f5c0948269e918c9157dbddd1.pdf
    • https://static.usrfiles.com/ugd/8ab72e_aea52e30374849e2a482ee9b24d3ffb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cbaa84d9d7345cf81a4212289ed7854.pdf
    • https://static.usrfiles.com/ugd/a4e402_5cbf9bfcf4314b15ab3319bdcafea897.pdf
    • https://static.usrfiles.com/ugd/51c472_610b101382d54f1eb9b583d12bc5c0f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd612951ca1747b4a411d83b7988187c.pdf
    • https://static.usrfiles.com/ugd/ade4e6_ca3590ddfad64488a6ef1c5960435ca5.pdf
    • https://static.usrfiles.com/ugd/234f58_e5cb2cca08e34bd0a0e12e62bba9e48d.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/wumunud.pdf
    • https://cdn.shopify.com/s/files/1/0436/1158/6722/files/vesimiwufimiximeduv.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_off00005acb.bin
20a9e16026113449aaa49a27ca3621e175afc9bb82029003283c88a0612f4816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACB 4980 bytes
font_01_sfnt_off00006bc7.bin
e75f01d9edd273913817e1fe8014bd843b36c15446469aa4346500fef307e6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 10192 bytes

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