Malicious PDF — malware analysis report

Static analysis result for SHA-256 203a344c1657ce26…

MALICIOUS

PDF

52.8 KB Created: 2020-08-30 17:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 987eebbede51e0ab5a5468bbdb396b74 SHA-1: 712c37698950173d44ad31b6d763198b92391ec2 SHA-256: 203a344c1657ce262ca7b6c62cb24c47b92a25a30b4271b2123480c75e47a6b5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=know+the+cause+phase+1'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF documents. The ML classifier also strongly flagged this PDF as malicious. The document body contains the same malicious URL and references to other PDFs, reinforcing the lure.

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.cc/wix?keyword=know+the+cause+phase+1
    • https://static.usrfiles.com/ugd/7d1dc9_29ae356276d549868efc2ddafb13a141.pdf
    • https://static.usrfiles.com/ugd/b0b521_5454208972d24a668bf18e9bae278909.pdf
    • https://static.usrfiles.com/ugd/ecec20_c6f8c6d1a7534455a3dac7b584709180.pdf
    • https://static.usrfiles.com/ugd/b8c837_58ad093217334ca2b9ab7adebf70c51e.pdf
    • https://cdn.shopify.com/s/files/1/0469/0234/5890/files/78319648633.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/98737150493.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/12376161183.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/hit_em_high.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/demexo.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_01addc3bb66f460288916c259302a785.pdf
    • https://static.usrfiles.com/ugd/7f16bd_fcc6f8cfeca14f7ea8753db996b2d129.pdf
    • https://static.usrfiles.com/ugd/87fdc7_f20a7f9bdc4549319cc533415733a0a5.pdf
    • https://static.usrfiles.com/ugd/47b1e8_3950d5a2ed6146b19b6712b9c8b2623d.pdf
    • https://static.usrfiles.com/ugd/10b11f_619b0b954786434e9968c97966bdf3c9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008494.bin
a068e8d803122f159f3aeecb4220ce1df88056cbd020cd0a7ddd189fe6a4e5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 4840 bytes
font_01_sfnt_off0000951a.bin
b04a83f4193b4fad92e04883f43b86c3cd770c08e3b082179a6071b38ce53d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 10272 bytes
font_02_sfnt_off0000b82f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB82F 4324 bytes

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