Malicious PDF — malware analysis report

Static analysis result for SHA-256 819f09d662d90e99…

MALICIOUS

PDF

43.2 KB Created: 2020-09-19 00:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995ca25841b9473611b16c2cd354697a SHA-1: 2c1404447b2d3c89ea4ec59a99548baf5626d831 SHA-256: 819f09d662d90e99c9eee3fac10bb7ce3aed73eb74a2446ee98cd74b613c5653
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL, https://ttraff.club/wix?keyword=project+cars+2+trophy+guide, is presented as a 'project cars 2 trophy guide' to entice clicks. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings confirm the presence of malicious redirector links and a link farm.

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=project+cars+2+trophy+guide
    • https://2d67cb04-5a40-4cc0-9d4f-3071e0ab31a8.filesusr.com/ugd/decf6f_8db2b5751da44dbeb923d4f7d5329c5b.pdf?index=true
    • https://09a1a194-2554-4bb8-87d5-f0ab035ffa66.filesusr.com/ugd/3b47cb_43c43694693440709f34c79469ccdec1.pdf?index=true
    • https://7a7142bf-c6f8-4eed-b685-a885109433f9.filesusr.com/ugd/c33cdb_4a09e9372e54468fb5c510c5196b142c.pdf?index=true
    • https://4e33cb61-b942-44c3-8965-7f424d93a6d9.filesusr.com/ugd/1f6d71_4213292ca5fd4e509b55fd32d72e0f39.pdf?index=true
    • https://9f19f7b6-5050-4534-ae33-593b56e7b8a7.filesusr.com/ugd/9ea91e_8be1c0c2792b47d6bfcc09076e72964a.pdf?index=true
    • https://a1369047-8af0-4930-a832-9e1eaa36f7a4.filesusr.com/ugd/cbe7f7_b537df0b420e41ca97bb3a6382ce2182.pdf?index=true
    • https://084998bd-82c0-435b-a654-323a86480ca4.filesusr.com/ugd/417718_8bcaa14329bc459e817303ebe4466ec9.pdf?index=true
    • https://52c454bd-f213-45d6-90d5-51e9ecb5104a.filesusr.com/ugd/9f69bd_426d0d5718854c60b295da704ca764fc.pdf?index=true
    • https://3303bc2f-42b7-4fb5-8883-ae5119349733.filesusr.com/ugd/30e015_47363befa2154900b0c20a678dc60b79.pdf?index=true
    • 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_off00006a1c.bin
c391832d5c0bd9afabbaec8f229250e6f247d612e8527ae0b3761ac99fcf83a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 5612 bytes
font_01_sfnt_off00007d3d.bin
539ff82ee67f5d45a35b11a4e7a874229a1a3c204a11e79085c19884704a34e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3D 10228 bytes

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