Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6314be8414d4eb6…

MALICIOUS

PDF

39.8 KB Created: 2020-08-29 06:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0bc0a09b19559333d6792b039c6dc1a SHA-1: 8d80502dd338ef4e51c6832f238c1103002fa234 SHA-256: e6314be8414d4eb66ab06acdf0463a3d95910ae8b1e18cb9b53b39a83f1daf23
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=pool+temperature+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF documents. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to 'Pool temperature guidelines'. No scripts were extracted from this sample.

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=pool+temperature+guidelines
    • https://static.usrfiles.com/ugd/b8c837_f4f1e1e5ff5b47909987506a0e287bf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_950f4480af9747f4ad58c4cec5241e0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e036c0224e99419488018ef3f52f9593.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/11020533554.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/74581567478.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/eclipse_stephenie_meyer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/nesadefe.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ae1af4966641d28ffdef2ab6e409a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f4b208c544ea4a61d2f19902fb17e.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_off00005e58.bin
589bed866dfceaa08bce77aaa44fcd04caed9975cbd915e7542f746cc70b406b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58 5280 bytes
font_01_sfnt_off0000702c.bin
17dc8fb55805a10882c4c19ce5ff6e2c4e85865740e9481051f07885ae050bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 10176 bytes

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