Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8b4db05e3cb27e…

MALICIOUS

PDF

44.6 KB Created: 2020-08-30 02:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cefa5888b6a395a897c145996f7f5c9 SHA-1: a09b64f3562cc602d85ec6174af849c6abe264ab SHA-256: 7c8b4db05e3cb27eceb788321ac12b365911543a0ddabac01a2ce29c272327c3
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is further obfuscated by a query parameter related to 'minecraft fabric and forge'. The document body, though heavily garbled, contains references to this URL and other benign-looking PDF links hosted on static.usrfiles.com, suggesting a deceptive lure.

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=minecraft+fabric+and+forge
    • https://static.usrfiles.com/ugd/b8c837_99b8d2701dec48bc942afa41628ccfdb.pdf
    • https://static.usrfiles.com/ugd/b48b60_06a0ffbabb38423487708e114f7f3855.pdf
    • https://static.usrfiles.com/ugd/8cbfce_bfd5ca0ec4b0432b9254dbde91189bc0.pdf
    • https://static.usrfiles.com/ugd/362633_c90eef6829504901974bbca9af284e6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ba4d94663945188c53ab2d047448fd.pdf
    • https://static.usrfiles.com/ugd/3b47cb_ea0d178df630439f858524ad6d2e141e.pdf
    • https://static.usrfiles.com/ugd/07e02c_9fff6ca544b349e49999c42608014dd8.pdf
    • https://static.usrfiles.com/ugd/9c43ec_4a675df99fa44a1baa00ce8529e1036b.pdf
    • https://static.usrfiles.com/ugd/a2e20a_4e8e589fb77440eaaa5ab70c20a0144f.pdf
    • https://static.usrfiles.com/ugd/735189_f17500016ce24735b260e7f7cb1fea56.pdf
    • https://cdn.shopify.com/s/files/1/0440/3026/3446/files/gojes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/bejabusemakelekixod.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_off00007033.bin
35bd277eed39fffc552e48545d64c83a62db764902ea7ffcd1927946447e3bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 5124 bytes
font_01_sfnt_off000081aa.bin
f725f3564015f72d4c6cefbd7b001e743d2683c253e2c4df62c2c7ed60672225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 10696 bytes

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