Malicious PDF — malware analysis report

Static analysis result for SHA-256 420b923db4ec33b7…

MALICIOUS

PDF

43.3 KB Created: 2020-09-02 05:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c0fa344dac66eebb29c32db72024ebd SHA-1: e5bebdaab5fe5d6da270973e01f920cb8d912fbb SHA-256: 420b923db4ec33b7717ae0da3b2c08049efb10e9ad134567e3991b95e3c3fe71
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=graphics+card+benchmark+software+free'. The document body also contains this URL, along with numerous other benign-looking PDF links, suggesting a link farm designed to obscure the malicious destination. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the attack pattern of luring users to click malicious links under the guise of a download.

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.
  • 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
  • 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=graphics+card+benchmark+software+free
    • https://static.usrfiles.com/ugd/a6e5e9_1100f21742da47998e15e23b79795d39.pdf
    • https://static.usrfiles.com/ugd/e4ff69_7c1271197f934cecb4317b4016c2fd8b.pdf
    • https://static.usrfiles.com/ugd/ab059d_45f3a9a495e646f0a8398643a29c0935.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_002729ebc81b49a5ad2de4e339c29998.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a18f7f59f3f64decbbf500eb56b9c0f5.pdf
    • https://static.usrfiles.com/ugd/565485_3ff86da47cf5433b867c1d1f6ebbd617.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/96990252105.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/sepuwiditiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/dohrn_insurance_training.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/85394941811.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/lulivunotolewok.pdf
    • https://cdn.shopify.com/s/files/1/0438/2477/5330/files/zonivadodakupuzumonaxefi.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_off00006b78.bin
e45379f4cdc22349a1617908ceaa38df6f3baec0bd3e3a50e1acbef769bcf8d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B78 5692 bytes
font_01_sfnt_off00007eaf.bin
dc41b2da1cc319bf8a8359272b41b0938371f8a3606c40c6719ff0fc8881428c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAF 9892 bytes

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