Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0e0dd9e3875537…

MALICIOUS

PDF

35.6 KB Created: 2020-08-30 10:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf365dc7d5da9ecfd22facb4c5b1e1a1 SHA-1: bd90e1e16258f93d77131c95fc5a4a0791a326e8 SHA-256: 2c0e0dd9e3875537476bdc7dcc05006b7237047ff3610ca7d1053581b18a8a05
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to PDF files hosted on static.usrfiles.com, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains text related to "Shaft guide autocad" and the authoring application, likely a lure to entice clicks on the malicious link.

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=shaft+guide+autocad
    • https://static.usrfiles.com/ugd/7598fa_71f210afc1be4d4683b5ae9cb96b7c72.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a9303f070e4eaf9df2091cfe583edf.pdf
    • https://static.usrfiles.com/ugd/b8c837_20de3a8b3a7c429c996668ffc80d8e8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_92074b9a757c491eba549f6adecaa1e6.pdf
    • https://cdn.shopify.com/s/files/1/0462/0989/2505/files/23336108792.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/fobowexasafiwatusubog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/dugelumizewasajikewikas.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ecd37ce575b4c098c3e4f48f0d4c8d3.pdf
    • https://static.usrfiles.com/ugd/e745be_c799af0b9dd44245bf43b888f6c4b7d8.pdf
    • https://static.usrfiles.com/ugd/b7306e_4c663a1f465c4aa28c420634be6dcbcd.pdf
    • https://static.usrfiles.com/ugd/b7082a_7e11e7ba3b504570b897622132ac152c.pdf
    • https://static.usrfiles.com/ugd/3fc21f_a31a0f87b8924bbead7c9de488333a3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_22d89e09ffd047df98b25af2dc1b2302.pdf
    • https://static.usrfiles.com/ugd/0779a3_81689e46305c4c53a4474f5616c385e3.pdf
    • https://static.usrfiles.com/ugd/5cf23b_f9172bb593454d81a54b1eda968828fe.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_off00004d11.bin
45a2d1425060a8bf238367be1a16782c961bc942665bc433901e3a623b4ff539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D11 5080 bytes
font_01_sfnt_off00005e4f.bin
004303233942422ec902c6848377fd69a0720ee0391e17007b411b12819e69f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 10628 bytes

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