Malicious PDF — malware analysis report

Static analysis result for SHA-256 9266e3c452b6b4c9…

MALICIOUS

PDF

56.8 KB Created: 2020-08-10 18:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b80ed95bab9dd2ccdcb384bf2f94f55d SHA-1: 8b5221cd8557783f2b731d300d8198a7a068a949 SHA-256: 9266e3c452b6b4c99096773664e24205819437927df7023fc0a0f32323758a59
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive 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.com/pify?keyword=business+proposal+sample+format+pdf
    • http://dunewesu.lakesuperiorsanctuary.org/uploads/1/3/0/7/130775795/5902341.pdf
    • http://files.photosbywildwood.com/uploads/1/3/1/3/131398224/d1638605c7c.pdf
    • http://lonetik.villatesoristjohn.com/uploads/1/3/1/6/131636664/7530504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1501/files/40473886664.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/bisiwer.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4637/files/bukotasazaxegitusited.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/1046614744.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/pre_calculus_12_student_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0972/files/sahasra_ak_arabya_rajani.pdf
    • https://cdn.shopify.com/s/files/1/0440/8147/9832/files/agriculture_mcqs_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/neseratumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/fulejobaginubowisorovusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/14890512271.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_off00009f47.bin
c15241d446a93710b60796ee1a4502a220d7cc24f947f15f036fcd4f14c8d7ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F47 5236 bytes
font_01_sfnt_off0000b0f6.bin
46e81e09fdd52c2e6297cab917abdf491c77e1bcaf95f2393b607ec0bd7b4ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F6 10872 bytes

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