Malicious PDF — malware analysis report

Static analysis result for SHA-256 badbd05587eb80d8…

MALICIOUS

PDF

52.2 KB Created: 2020-09-07 23:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022ed997c92ba5590fb322254abd7f1e SHA-1: 640dc3a8b9ccf0f1dfe92c8d6f4b65f4bafdfea0 SHA-256: badbd05587eb80d89d3d2c8334902bc212949e7afe28932851b74fb7f626d0e6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one leading to 'ttraff.me', are indicative of a redirection scheme designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other embedded links.

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.me/wix?keyword=friendship+status+song+free
    • https://static.usrfiles.com/ugd/13ae68_613bb21f05ec47f288433bbec80f52e4.pdf
    • https://static.usrfiles.com/ugd/22bf55_a2a9b8686db94bc9a2b5bb79d156edb5.pdf
    • https://static.usrfiles.com/ugd/978dd5_24915533ff6041bbad2be34d9a53a4d2.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/xapijud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/basics_spatial_design.pdf
    • https://static.usrfiles.com/ugd/8bc2a6_92f0ab701bc14741899745488492cd97.pdf
    • https://static.usrfiles.com/ugd/417718_41a4dbc18c9e43d3afaf387731bf1a20.pdf
    • https://static.usrfiles.com/ugd/cd81e9_9944837c77a646fc9420bdf91215f891.pdf
    • https://static.usrfiles.com/ugd/756799_bbd35f29903445c1b00f6789780e69b5.pdf
    • https://static.usrfiles.com/ugd/cece23_eceadc04b9b348ffaf6284e7f0ea57d5.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/jerikexel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/89121787406.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/xudosuvabafi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4419/0880/files/cyber_bullying_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/78326693747.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_off0000864d.bin
b3554dc3226ea2e62d59ae8174f16f15c500c701eb0a4f73f20aef5e80116e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864D 5228 bytes
font_01_sfnt_off00009816.bin
f06ea96a18a2ee6f9aa8bd18174717beb2791c36917a2e58045eca7526996778		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9816 13944 bytes

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