Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e83ce4d724d444…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 04:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb16f36cc3a860ac1cbe638658a84afc SHA-1: 226c33119a09473c00571f18c60b9b224e03e8d8 SHA-256: a8e83ce4d724d44474de5602fb8f371b04046e2f7e7932288e7825abd16fca13
150 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.com/wix?keyword=tv+speaker+system'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, including one hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a 'tv speaker system'.

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/wix?keyword=tv+speaker+system
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/blackberry_8900_os_6_link.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botezosural.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/tesinifomunozad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0439/8150/4670/files/sodium_dodecyl_sulfate_sds.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/navopetajerutajun.pdf
    • https://static.usrfiles.com/ugd/b47706_9a6f3652b1d644e6af018943b00ab2dd.pdf
    • https://static.usrfiles.com/ugd/a18aa6_58338573f81d433f8510d7654835165d.pdf
    • https://static.usrfiles.com/ugd/b8c837_112e37d575d94b13ad97b65818674c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8555c1c37a24b359f0d14872b9a1c43.pdf
    • https://static.usrfiles.com/ugd/b11f6d_f9d9d3cdcc1345a7a6ef69972ee7b498.pdf
    • https://static.usrfiles.com/ugd/c1108c_dad2342ad1264100bab45e64c373018f.pdf
    • https://static.usrfiles.com/ugd/b8c837_99629299280b4f74b9c96dbba9db3d3d.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_off00005e1e.bin
8c54ad2c40e49e4821d24742544aaba73c2edd683262597c42bc400347641ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 5108 bytes
font_01_sfnt_off00006f7d.bin
c98296089614431ec97eab9e6e866c77480e9da7ab4d874f2dfcde5359333b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7D 10044 bytes

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