Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba4d6bb4210919b…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 18:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70d133db9552d13e0985dddc541e95b0 SHA-1: f901a9f345855e501e1ffd9418319f87aa27ed09 SHA-256: cba4d6bb4210919b561d3102b29f1894fd364e32bfa6fdcfef6087c5f3214f11
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 'https://ttraff.ru/wix?keyword=obeb+ve+okek+sorular%25C4%25B1'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'https://static.usrfiles.com/ugd/5b5da7_0b5eb84796c24d688b050a1df3039901.pdf'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure 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.ru/wix?keyword=obeb+ve+okek+sorular%25C4%25B1
    • https://static.usrfiles.com/ugd/5b5da7_0b5eb84796c24d688b050a1df3039901.pdf
    • https://static.usrfiles.com/ugd/b8c837_4cb3ad1242f04be28a2eabfdc0afa6fb.pdf
    • https://static.usrfiles.com/ugd/8b2c09_e04f7048e2af44a3aebfe076ba5acef1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/renujaramoxumugas.pdf
    • https://cdn.shopify.com/s/files/1/0437/1293/8152/files/pubovajobadepojuri.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecdd369a514c4b62820ed775c77ba857.pdf
    • https://static.usrfiles.com/ugd/b8c837_195e06c7da894170a91d6081932901e9.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/37124666802.pdf
    • https://cdn.shopify.com/s/files/1/0452/1967/6311/files/70353066509.pdf
    • https://cdn.shopify.com/s/files/1/0434/1664/9890/files/cctv_setup_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/46668008821.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_off000054e5.bin
93e05e3f1f196e75cbe29d481a12ff3e3a97d0958068f7464b4d7963992bd098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E5 5004 bytes
font_01_sfnt_off000065f7.bin
e8632815afb367cee36a8bf1a0f9e14b33c5287a990378becc1c649848a7cf04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 11316 bytes

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