Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4262e9c56ecb72e…

MALICIOUS

PDF

41.9 KB Created: 2020-09-01 18:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f52e7a0f04c136b5b5cd64f6d2e75c3 SHA-1: 547bd3a526ee82ae1a97636c8f00c0876a3a40fd SHA-256: b4262e9c56ecb72e2efcdc6c3613f9d0f392875b85a6ddccbe8d7673e0abef2c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive link, disguised with a seemingly harmless topic.

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=carousel+melanie+martinez+sheet+music
    • https://static.usrfiles.com/ugd/9e53d4_d0ec9807674545c58e0573800a0393cb.pdf
    • https://static.usrfiles.com/ugd/628a76_c27c4138bb1f4be79e18b3188594b9f2.pdf
    • https://static.usrfiles.com/ugd/03ae60_db2642f0a73f48989abedab7e8aced8e.pdf
    • https://static.usrfiles.com/ugd/576447_8992a1d56abe4452bbac72e522ddc3e5.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/monagababugomoxusibix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9641/files/autodesk_vault_pro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/86717912716.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/android_version_name_list.pdf
    • https://static.usrfiles.com/ugd/b47706_0c9ef6c0277f4bdb900ac8dd6c372176.pdf
    • https://static.usrfiles.com/ugd/1e4819_2c3982c0476f4539b1c7ac4c8a0f40d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d34c880e3b14f44b39ab8d267b25c3f.pdf
    • https://cdn.shopify.com/s/files/1/0459/9316/4959/files/beyond_the_clouds_kdrama.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/general_knowledge_quiz_questions_and_answers_nz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/accurate_daily_horoscope_app.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_off00005974.bin
6f102ecfb986d059ee0913482082a43be265b4e5ed734a80bfe82a3ca38ededf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5974 4992 bytes
font_01_sfnt_off00006a44.bin
a25db4b179e3a35d5e5c74455134ff5503863e6776bc0fd176d6d3c4ad884c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 15764 bytes

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