Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e0062678e802fc…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 13:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c092afabd6d944745cbf28b89a9b0fb7 SHA-1: 3f4b1d031e3ff0689b6461463188732525694303 SHA-256: f4e0062678e802fc9749a73b7e93966c1183f7d69fd6554309e8b1a642502cdd
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the string 'vehicle purchase agreement' and the malicious URL. This suggests a phishing attempt to trick the user into visiting a malicious 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=vehicle+purchase+agreement
    • https://cdn.shopify.com/s/files/1/0457/3750/9020/files/responsive_newsletter_html_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/criterios_diagnosticos_para_cetoacidosis_diabetica.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/pokumusejam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/megisofibukamasexi.pdf
    • https://static.usrfiles.com/ugd/b8c837_799fc3ec7588419b9818c07b63ee78e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_32fe25f75ec94347bb927212096f365a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd478a87a217432d8bf1dbebc761b52b.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0fd589c49c4cc1b8f514fae60e0fe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e01101c276c4def90c95f0ac247a265.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e6caa1872b43a28dbce8683b806f40.pdf
    • https://static.usrfiles.com/ugd/b8c837_090c96f2527b490692779b830e1be589.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_off00006c7d.bin
5334304935c01143e5cd067d24c9efd81c6de9522bccfdaa6bdfe3fa47d960bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7D 5312 bytes
font_01_sfnt_off00007e67.bin
fb67422fedc9e78dcabe4ed76cb073c8330e30b1facb7b7c4afde2a46f115d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 9992 bytes

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