Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1673a26217a340d…

MALICIOUS

PDF

40.7 KB Created: 2020-09-02 03:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf375afa98a6fb6b51772e90250c96c SHA-1: 4ca3e3c84ebf0e3500567022fb2599883ce2eb62 SHA-256: c1673a26217a340d71aeed3b5724c4906cf5136cb740ea200cf20e33824a59b3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used for phishing or distributing malware. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com), suggesting an attempt to lure users to a harmful site. The presence of a PDF link farm further supports this malicious intent. No scripts were extracted, but the extensive linking strategy is sufficient to classify this as a malicious document.

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.com/wix?keyword=trumpet+christmas+sheet+music+free
    • https://cdn.shopify.com/s/files/1/0434/6091/9461/files/dejirebojifutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/mixutubaselo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/22090228332.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/vitirimodoxegajiwo.pdf
    • https://static.usrfiles.com/ugd/34e21e_701848c6c581430fac3f2427be05c3b8.pdf
    • https://static.usrfiles.com/ugd/ae059d_45ab5a2daba04477988818d7b5998e83.pdf
    • https://static.usrfiles.com/ugd/94e5ef_3bc93090b62a40c8ade0bae933502e13.pdf
    • https://static.usrfiles.com/ugd/b8c837_603c1f8d26f5401094174002416790d5.pdf
    • https://static.usrfiles.com/ugd/9ec29b_093a90ccdcc245ae8f80016bc4e018f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd7f8ff25d8455e83d95834c6718109.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_off00006283.bin
2e7d611cf2b5a4050f2224ccfc62fd311ecb173b03eb3e301412a80fd7df6fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5172 bytes
font_01_sfnt_off000073ef.bin
68009cfc25b6603927c8cf5c152bffa734779d864c4d7983c9c79764811e6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 10128 bytes

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