Malicious PDF — malware analysis report

Static analysis result for SHA-256 b956f69df2811ecf…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 20:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46961ddf0e409c20ae88820c9ef0474c SHA-1: 6947c6dcee7c6f005536a6e3018d79f38573daa7 SHA-256: b956f69df2811ecf84591d6e02baa9acacd2197cb51653e008fed2ead98ff19e
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to redirect users to malicious infrastructure.

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.com/wix?keyword=manual+jupyter+notebook
    • https://static.usrfiles.com/ugd/b8c837_62918db86f814b9ab2c56ab61585f3c0.pdf
    • https://static.usrfiles.com/ugd/0c41e7_8f1ff589178e41d796f8a1ccd980227a.pdf
    • https://static.usrfiles.com/ugd/bfbc46_3b0420763d254cf589407d8a978671e0.pdf
    • https://static.usrfiles.com/ugd/a467d2_0c64027518d64c4ebb726dfdae4bd700.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6b220cd9027416581aa06a027d7ee98.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_9e5eef9ddc684b6f97cce9e9533cf82c.pdf
    • https://static.usrfiles.com/ugd/d55797_ef46cf8df31e4dcfbc0ec7ffff424fda.pdf
    • https://static.usrfiles.com/ugd/3aca14_a9e3c263df9f41708e5aeaea3eb7c901.pdf
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eafda8cdabe4d9e95f107198542fcfc.pdf
    • https://static.usrfiles.com/ugd/36f25b_304cc5febf5a41c6bc2ad97a24a150c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c019b9e74c742288d9546c192187095.pdf
    • https://static.usrfiles.com/ugd/02beb7_1f695dc5eef3478f9948b91771783509.pdf
    • https://static.usrfiles.com/ugd/b8c837_1184f9f3fe86435aa291defcad351a0d.pdf
    • https://static.usrfiles.com/ugd/f0e51d_29b21de5c6cc4964a29ab248a740af65.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c2bd1ba2946422e9b18d87b97acfd0e.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_off00005fde.bin
a4e0ad81edb33b4a63164d9607a121cbf5f16370a5d66580ffb1ff62ca28a877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDE 5024 bytes
font_01_sfnt_off00007111.bin
94044436ee5a16abcf53dd048e5cd8a87a1a3769771a33e2683a083861e8be3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 10368 bytes

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