Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0e62a796f52ba3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 12:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98baa4fdedc6d4150baab69db68f99a2 SHA-1: e8f13529b056a2332278c3309e190dcf73f0379b SHA-256: fe0e62a796f52ba36f14ea5827ae7754f52766674f7fa26f491752f6c26b8f7c
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves to obscure the ultimate destination of the attack. The document also contains a large PDF link farm, with many links pointing to static.usrfiles.com, suggesting a SEO poisoning or link farm tactic. The presence of these elements indicates a likely attempt to lure 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.cc/wix?keyword=of+mice+and+men+language
    • https://static.usrfiles.com/ugd/4cf28d_52d5ef7ddaa84d9da2889926f3c24333.pdf
    • https://static.usrfiles.com/ugd/b8c837_80cac8eeca774c5aaaac7f0051ac1ef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2905813d1b94269b7e4016a43023e5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3760a391cc2b4da189a954bec98d68ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f31962ec1ad4c449e17e7687c582818.pdf
    • https://static.usrfiles.com/ugd/b8c837_a234725131204072be73204f96052323.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
    • https://static.usrfiles.com/ugd/b8c837_02acddd7e40b498da8af23f36e4353ed.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/63931975065.pdf
    • https://cdn.shopify.com/s/files/1/0463/3837/5842/files/aluminium_checker_plate_sheet_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/bevesalidixopepaxugora.pdf
    • https://cdn.shopify.com/s/files/1/0462/4144/8090/files/envisioning_information_edward_r._tufte.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_off00006d9a.bin
aa8693d076201030006d3bba2621be403037d01ec697e2b41a50ee7364be08df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 5092 bytes
font_01_sfnt_off00007ed9.bin
f1745eed66c9ad57a25a45a623762c2d8e410cbb64ddf19828c10ee3a1fd25c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED9 10120 bytes

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