Malicious PDF — malware analysis report

Static analysis result for SHA-256 9082527828df7337…

MALICIOUS

PDF

48.5 KB Created: 2020-09-04 13:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f2b8f249cef6a0449054375d552e44 SHA-1: eaf4a5210e1b2bc9b09a6162c4a362499c87f20f SHA-256: 9082527828df7337906d7d18fb66373b51daf600c520473f603f743bd54de6e4
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm for SEO poisoning or phishing. The primary malicious URL, 'https://ttraff.club/wix?keyword=marvel+avengers+game+trailer', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, reinforcing the attack pattern of luring users to malicious content.

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.club/wix?keyword=marvel+avengers+game+trailer
    • https://static.usrfiles.com/ugd/a59130_a8f0935d975348d5acecbfce6b27d937.pdf
    • https://static.usrfiles.com/ugd/9757e7_079df3650aae4b81be825a07c52a0b73.pdf
    • https://static.usrfiles.com/ugd/3dd68e_3109f192be7a462ba7a4cf8b7703ce96.pdf
    • https://static.usrfiles.com/ugd/c81504_5c11bd7b3ec54dc0a691d8d5481179f2.pdf
    • https://static.usrfiles.com/ugd/c7a620_b358197139f44c869a24e75aca7bbf0d.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/fanebezosogiworifaraxofo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/gupasirexot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0549/files/availability_bias_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://static.usrfiles.com/ugd/b8c837_f035972904dc4f688e7143e1609cbd03.pdf
    • https://static.usrfiles.com/ugd/b58d21_18d41046571e4232b1a762c9cdb0e7ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b501853060a42d7b78d1b69e0aee4bf.pdf
    • https://static.usrfiles.com/ugd/ade4e6_cd27f4c1b3d44f9486b9502019eb4291.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_off00008055.bin
53b07e39a5c3a8ed54ce02adbd826073867a6a308ab7ff2122db97ce47800493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 5068 bytes
font_01_sfnt_off00009192.bin
3a17c421de1598a467b5b51c4fe858c4e200dddc08f85822e21c47d913d2ebe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 10448 bytes

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