Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fab6c4b496ddced…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 17:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f3bf7d25f367ed4e202db7981ccac02 SHA-1: 5eecf94f8cd02203adc9bbb817a3f2097c434461 SHA-256: 3fab6c4b496ddcedc68bc31667a87393a24288412290035f69c261db86e6cc7c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The presence of a link to 'ttraff.com' which is known for malicious redirection, and a large number of other PDF links, suggests this document is designed to funnel users to potentially harmful websites.

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=national+fire+incident+reporting+system%2528+nfirs%2529
    • https://static.usrfiles.com/ugd/7603ae_f3f2ecc023c04a7aa3b73d0a72a86059.pdf
    • https://static.usrfiles.com/ugd/83e24f_357c1a6e02a44ca09b24792011c9b515.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ab13af961bc4280b78ae6cec885a270.pdf
    • https://static.usrfiles.com/ugd/e5a943_2b1eacf2cfcc4c28b1f738e74b3c3aea.pdf
    • https://static.usrfiles.com/ugd/e4bc37_4f03c6e72b614991a3e096e2bc1166bf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/baxudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/73290383119.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/94469571691.pdf
    • https://static.usrfiles.com/ugd/1b8612_5a416e1bea03470c8de7bd707935d35c.pdf
    • https://static.usrfiles.com/ugd/5af86b_3f3507a73c6641789397ce3e82152d16.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_5488e0ea92fe4b3ebc446b97b64cecc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fcee2258a4d418ea635d4094cd36c73.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_off000060a9.bin
77a8ebb7db63cd92ff7e80e7bc7fd6971c017c92e1c591ae1a104683ae644faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 5700 bytes
font_01_sfnt_off00007422.bin
a46396fa3f46300f6f53742a3255c119553102cdf754b601822f993e6bd57567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 14792 bytes

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