Malicious PDF — malware analysis report

Static analysis result for SHA-256 726ab5959eaa221b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 13:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c32ec6739cf434663b06d2c35c1b2c SHA-1: a79d603b477f5b5ff4e1accb781eee0a3f93ee58 SHA-256: 726ab5959eaa221bbe4c805f71645e9f67e2ddbd99bbca10873f0dec55172b71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, a common tactic for SEO link farms and potentially malicious redirection. The primary malicious URL identified, 'https://ttraff.ru/wix?keyword=humpty+sharma+ki+dulhania+full+movie', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=humpty+sharma+ki+dulhania+full+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/07625c_ed621d3c09f840898914e59ad1c710dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_addb9fa3073e4f5f83a82566d5c84c1a.pdf
    • https://static.usrfiles.com/ugd/f09a9d_c1e2e07a534244108e989472ea9748eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbdc8e6b6902448cb83e89134be9ba4f.pdf
    • https://static.usrfiles.com/ugd/7ff653_1e6a16e935a94129a88a3c1536cf485e.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/69998679398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e92fb60ed864ab5a96120212c2eb62c.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_319dfe4abf5041f2bd9dd573144daa7b.pdf
    • https://static.usrfiles.com/ugd/8e1900_03e176d19b4c47cbbae741876bb86863.pdf
    • https://static.usrfiles.com/ugd/2274a7_e949323c850e4d41afcc368164f5f03f.pdf
    • https://static.usrfiles.com/ugd/b8c837_042007822ad24e519d279f0d3604b673.pdf
    • https://static.usrfiles.com/ugd/122077_7a35b95b6da0454a8639eb7b41701b79.pdf
    • https://static.usrfiles.com/ugd/314c35_a01b7ca4e8c547e08e54b9c09113fad9.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d8.bin
51bbf636368dccd12cd7ad2a0e9eb85c1dd041890a52abc6363ee665d9353568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 5468 bytes
font_01_sfnt_off00007458.bin
71fb4d0394ac95fbf40bfbcb9304169a04d3492c85ed2de10f1eb56c8d295e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7458 10352 bytes
font_02_sfnt_off000097fa.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97FA 16164 bytes

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