Malicious PDF — malware analysis report

Static analysis result for SHA-256 1908d757ba0c1328…

MALICIOUS

PDF

40.5 KB Created: 2020-09-05 19:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25794a7ae7a4c0655279101b1cd77623 SHA-1: ffa9cb0cbc5893cf8e3ae4b02e0d254f5defa6b9 SHA-256: 1908d757ba0c1328182d072c763e2763b17baf42c1c754f7ef20d36848a34f0b
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=carrom+board+trick+shots+pdf', is identified as a malicious redirector. The document body also contains this URL and references 'carrom board trick shots pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links further indicates a link farm, a common tactic for SEO manipulation and traffic redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=carrom+board+trick+shots+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1eeb1d42e4af45868d3c1e9680d850aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b92c904487cc4e9981450bb482de60a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5167c9114e9049b4a8e69f9a70e1bfdd.pdf
    • https://static.usrfiles.com/ugd/50988c_cbe166ca81ec42609a173a904f9b999b.pdf
    • https://static.usrfiles.com/ugd/b8c837_89420d9cdd134c49b61f073232333673.pdf
    • https://static.usrfiles.com/ugd/6cf392_a2ba2abf482a4cb2a2303940c5be8fff.pdf
    • https://static.usrfiles.com/ugd/097bd5_01340d9b19b940d29c4bc97c2a76901d.pdf
    • https://static.usrfiles.com/ugd/73c254_fbf87cb1ffc34da4b5ceb027112b2b63.pdf
    • https://static.usrfiles.com/ugd/0047a4_b1ced37b43eb4e75a699a21625189ce2.pdf
    • https://static.usrfiles.com/ugd/cec570_beef159ffe554bf28ecc1d24abfe2a28.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_4f7bc49d498543308a5aac776115c4e5.pdf
    • https://static.usrfiles.com/ugd/15d534_e089efb0707f48d087e60af1c9e20d43.pdf
    • https://static.usrfiles.com/ugd/b58d21_dc893857fad441fa8f7b5a4304289742.pdf
    • https://static.usrfiles.com/ugd/ff3115_cc29b1cdfaae47399985d07b56c9b72c.pdf
    • https://static.usrfiles.com/ugd/76de1a_2fa95e85ef7e486c8c95781a51b90d1b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a1.bin
2124058dca3ca4227baab55aabebe6ec0c0055024dd97a522b5bf219a6df3001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 5472 bytes
font_01_sfnt_off00007507.bin
426d83448f12e0517b98a3fb761b583c4105ed8f646b55cc209f0ec27a68f106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 9444 bytes

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