Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c81c38a7869323a…

MALICIOUS

PDF

44.0 KB Created: 2020-09-05 03:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6067257178a65d89ab9c22293adaa2cb SHA-1: 9ad3a2289f561024b0f429536b3b6233d2bb5a73 SHA-256: 3c81c38a7869323a7d62893091ddeb056fa8c273a38ac759cd07c5818547f690
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious site. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=joomla+templates+open+source+free' which is flagged as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, with the dominant host being static.usrfiles.com.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=joomla+templates+open+source+free
    • https://static.usrfiles.com/ugd/b8c837_a869920c2be9433d96f3d89cfd14d061.pdf
    • https://static.usrfiles.com/ugd/516793_d5c1d561662d47189e5076204aa93b17.pdf
    • https://static.usrfiles.com/ugd/4ca7f5_0b2703632f914b47afd278662caac7ca.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_01c673c6e2684b1684ba6da7dcdd7e76.pdf
    • https://static.usrfiles.com/ugd/d775a9_214de8f51d5d4278a19a6031fb725985.pdf
    • https://static.usrfiles.com/ugd/81d6a4_6e171e2835904ceebd6e05fce14f89c6.pdf
    • https://static.usrfiles.com/ugd/89064d_527ae3c0711d41aba83466bda8805102.pdf
    • https://static.usrfiles.com/ugd/b16523_77f6003780c84f92820b12e914becc98.pdf
    • https://static.usrfiles.com/ugd/590778_2336e4cd9181407e8ab1021521b96723.pdf
    • https://static.usrfiles.com/ugd/857e61_77d689c3c3764b79a566bd26f3117970.pdf
    • https://static.usrfiles.com/ugd/30e015_f54bd55f0e154029b71f4ff659e37893.pdf
    • https://static.usrfiles.com/ugd/c0518c_b844a480edda48cf9cceb9eefbe8dac6.pdf
    • https://static.usrfiles.com/ugd/f459ea_b3e953552b7b4b6b9564410c6fcf3340.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_off00006e32.bin
aee1f8adf69a4e7dd94cd52646846f90772a5e0fde2638be79dc1e81b9a82f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 5152 bytes
font_01_sfnt_off00007fa6.bin
5d7874154ac5141fb3b3889c0a5cb3b1eaa167cb98431f176721e26a988527d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA6 10360 bytes

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