Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21326e1876d75ef…

MALICIOUS

PDF

116.8 KB Created: 2020-08-31 05:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af4822123b02dde4ddc5808d8e99e1ab SHA-1: 487d3499605ca23f4305c6100211fb60afe59e2e SHA-256: b21326e1876d75ef41f235c185fcd9c0e8927a880919147571f41371fb235c59
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm designed to improve search engine rankings. One of these links, 'https://ttraff.cc/wix?keyword=evangelio+segun+san+marcos', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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=evangelio+segun+san+marcos
    • https://static.usrfiles.com/ugd/455f95_2641e8dd9a4e4eecbcf9abd9e12df26f.pdf
    • https://static.usrfiles.com/ugd/ab059d_a297e785fc66400a87a17aba28bdc033.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2ba7c7dd6148fb955195fcd3266268.pdf
    • https://static.usrfiles.com/ugd/b8c837_39557059412d42bda1aebf6696bb70ad.pdf
    • https://static.usrfiles.com/ugd/e2c250_b94fff62366a4bdea63f65197552ebd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a48830810ed4c32a71d3450ff964d25.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2c2396210724176abdfc9fe94180e7e.pdf
    • https://static.usrfiles.com/ugd/234f58_d1fcc80242b14797b4461fd5cfc1f438.pdf
    • https://static.usrfiles.com/ugd/bfbc46_71f3bb1a05ca4ddabd31d0412b70dcfd.pdf
    • https://static.usrfiles.com/ugd/0adedf_f9403f8145924deca4a59fff68232087.pdf
    • https://static.usrfiles.com/ugd/7ff653_69f08117e6824303884a456f98bec8da.pdf
    • https://static.usrfiles.com/ugd/4c1554_9dc42eed33414c79b9898d82c0a6f5c4.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_5f0fc770efbe4f86be7b032020661b87.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7058/files/katadyn_hiker_pro_water_filter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/40253011105.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_off00018df4.bin
d810e02ceb9fa55075013df5ce06b1d170141ed807ca6b61668f28f70839439e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DF4 5136 bytes
font_01_sfnt_off00019f60.bin
10c438aed44cf4f7ff4fb4687a262e1422d2d491fdfd6e83b609e99b0cd63a5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F60 11296 bytes

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