Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7782262755fead8…

MALICIOUS

PDF

52.4 KB Created: 2020-09-12 02:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd4ee966f3c9e179eacc4bcf2d23eaa2 SHA-1: 62b16ad9e1ee168ac080dc3fee8b58254e58d68d SHA-256: a7782262755fead8a44c33a70c76191c242a2841e3a566c3aff8b3150431e685
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=formalit%25C3%25A9s+cession+fonds+de+commerce'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on 'static.usrfiles.com'. The document body, though partially garbled, suggests a lure related to business asset transfers, likely intended to trick users into clicking the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=formalit%25C3%25A9s+cession+fonds+de+commerce
    • https://static.usrfiles.com/ugd/89c6ad_74115fd7cfce41f49af14799c9c14dae.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6671860f1c5474090ecf45617181fe6.pdf
    • https://static.usrfiles.com/ugd/7ab50f_1ddb783c69b74690a6fb6933b050817a.pdf
    • https://static.usrfiles.com/ugd/03ae60_cc06606ef1ae4d06ae6d163171248b39.pdf
    • https://static.usrfiles.com/ugd/aec2ea_beea10e72b014f17b8ad9a03744ffc0e.pdf
    • https://static.usrfiles.com/ugd/fc3b0b_3771e381c0db468d9af878875ec7eb12.pdf
    • https://static.usrfiles.com/ugd/544c7e_9974f928818e4dcfa58b490ae66f879c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7163694d3c2420f8f09a255e1cdfa80.pdf
    • https://static.usrfiles.com/ugd/ca32a8_0365e4eac5fb413bbe35919f4ac20387.pdf
    • https://static.usrfiles.com/ugd/7e6083_41a80ab282d04480ae89c482f6013ad4.pdf
    • https://static.usrfiles.com/ugd/1849a1_964d57cb16604e8b9eb6c55acf71e947.pdf
    • https://static.usrfiles.com/ugd/96bf9d_ff62c8fca0c34137a40bb006ad1fd94a.pdf
    • https://static.usrfiles.com/ugd/8d5d69_6118b3a571804c43ad6ba792cb0f4983.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fb7.bin
a3e77b36034527d4e6c764900f282acad0c733ff11d713d986af5a0f18439231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 5052 bytes
font_01_sfnt_off00009078.bin
1b4e0aa2ca3853b75500685dfe6495d538650a3a40e8ae9b62a57e1b8d247fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9078 11644 bytes
font_02_sfnt_off0000b4b0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B0 4324 bytes

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