Malicious PDF — malware analysis report

Static analysis result for SHA-256 90148d6293f2eb5a…

MALICIOUS

PDF

51.1 KB Created: 2020-08-29 14:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a62a9609da92fb2b8cd425071508eb35 SHA-1: a19bbf7af114ddca86cd5e1f3b8fc00aaf146640 SHA-256: 90148d6293f2eb5acc6346704267e9b1d9aa43d4b8ba4ec4837f270a80da9f04
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.cc/wix?keyword=convection+current+in+mantle'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a potentially harmful site.

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=convection+current+in+mantle
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/vocabulary_describing_people_s_appearance.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/15165396991.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e2e55e826c147e89ea81c4fdd77ff3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5ccd4701b2d4f4f9a250e922d0e93c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3a0684e3e0f4a4e8832b2a17d4eba19.pdf
    • https://static.usrfiles.com/ugd/b8c837_023fcff311f84dc89e92900234c5be53.pdf
    • https://static.usrfiles.com/ugd/b8c837_6836a9617dd74fd388871391ef6bd062.pdf
    • https://static.usrfiles.com/ugd/b8c837_66d89211ace54cf2a4bfab0e80454bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c31558bff1c4664b5282cef82c857d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e224d62e4625486586df7525c34f32e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c7ca42a9a1147c2a5e7db55848aa109.pdf
    • https://static.usrfiles.com/ugd/b8c837_215ee62a3a1148b38f0730dcae6314dc.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_off0000765e.bin
b36181d61ecb5c70fae9b0201397f5a89df563c6bc07ec00d8215d64ba116346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 4732 bytes
font_01_sfnt_off00008658.bin
f1d46675aa65858325e2165533dd17249d9334a85ae66528cf5f004b55bd9a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8658 10720 bytes
font_02_sfnt_off0000ab3b.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3B 16036 bytes

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