Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ed0e8b0445e245…

MALICIOUS

PDF

38.6 KB Created: 2020-09-07 11:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867c467854d61a28c06cd01a165b85da SHA-1: e7833d324929d6bc6da6e5579710c0c02978f241 SHA-256: d5ed0e8b0445e245e0618aa03e9cec80a9dd7648bf952e4386d6d00f79c9b567
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=vceguide+palo+alto'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious redirector URL. The primary attack vector appears to be luring the user to click on the malicious link within the PDF.

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.link/wix?keyword=vceguide+palo+alto
    • https://static.usrfiles.com/ugd/112488_c2bd4796765b4f2a8c662bd99bb6ea11.pdf
    • https://static.usrfiles.com/ugd/99afdc_d9fb4945e967480b950057e26068330f.pdf
    • https://static.usrfiles.com/ugd/defcb2_87e98af05050410dad20725f460491ed.pdf
    • https://static.usrfiles.com/ugd/5b9a87_2e55ae6575ed44c080b48f2990c30aac.pdf
    • https://static.usrfiles.com/ugd/7e6083_bbee0a35690b4505ace8ed0835a9dad4.pdf
    • https://static.usrfiles.com/ugd/efc97f_234bb8d4dd3a48e5bc021b29bc7681ca.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/new_uc_browser_free_apps.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/wokoferefibaze.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4469/files/zurefewaduxogodiz.pdf
    • https://static.usrfiles.com/ugd/dc98cc_1f015dc9303049b38637d308f759ece4.pdf
    • https://static.usrfiles.com/ugd/d01287_c3b692de043c4627b20fa0bb942d555b.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_off00005a79.bin
7fc0741bb0eb9c9687a2a263803d7472980c9681c9971e591afaead86be6e06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A79 4932 bytes
font_01_sfnt_off00006b60.bin
206eb4d62a8cee558c83dc983701d416fa2a07581daee4fc691b408151d3bf29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 10252 bytes

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