Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e718982bcea3d5…

MALICIOUS

PDF

65.1 KB Created: 2020-08-29 22:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01dcfd599adfc0f7d169d54d525e1f08 SHA-1: aa15f61f69bd4f11c4deb43bcb0f8f43671de8dd SHA-256: d0e718982bcea3d5e9cd454c6f268dd35ba5bca3847ab167fa162641e751ac66
150 Risk Score

Malware Insights

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

The PDF contains a link farm with 13 external PDF links, many of which point to Shopify domains. One critical heuristic indicates a malicious redirector link to 'ttraff.ru'. The ML classifier strongly flagged this PDF as malicious. The document body appears to be corrupted or obfuscated, but the presence of the redirector link and the link farm suggests a phishing or redirection attempt 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.ru/wix?keyword=complexos+de+coordena%25C3%25A7%25C3%25A3o+p
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/c_s_lewis_a_grief_observed.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/68994639866.pdf
    • https://cdn.shopify.com/s/files/1/0450/3686/3652/files/vovoxojupubujubon.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/benejufunajofevalewal.pdf
    • https://static.usrfiles.com/ugd/b8c837_f97fa90c669740a3bcc3e42ca525cfbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_965c8c0373814048ad8d9eb9b11ac205.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/catalogo_eudora_ciclo_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/stratego_waterloo.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47d828a797a41e9897790c396789d76.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2876952825b457697e95e261c323dd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f64098da796439fb0f2081ca2bbbfc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f0ef534d9c14e938ebf0f527d2bec38.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c308b80a8334f6cbbac0840859dd934.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_off0000a628.bin
cdd8cc08f97215ad8d6e38a9ba1cc21936ab003d941875b57082f5a77cea8db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA628 5692 bytes
font_01_sfnt_off0000b890.bin
282f8f92916c17a89d365cf4f72088f6d55536441ff6e35a3f1e8e03efb1a2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB890 13152 bytes
font_02_sfnt_off0000e013.bin
01e49661dbdd7b4823267156d85e4b6ddc25a6de2ac0af4d78c137cfa2b371b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 16100 bytes

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