Malicious PDF — malware analysis report

Static analysis result for SHA-256 458eed308381bfac…

MALICIOUS

PDF

38.9 KB Created: 2020-09-05 11:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b52a0fb65380036780a5a6107c3912 SHA-1: 656df7c09a91b0fc961761d053e81b3ba53611de SHA-256: 458eed308381bfac9da02527b1664699982bffda9e06ef9183020baa02442266
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to 'Christmas party invitation templates funny' and embeds multiple links. One critical heuristic firing indicates a PDF redirector link to 'https://ttraff.link/wix?keyword=christmas+party+invitation+templates+funny', which is known malicious infrastructure. Another heuristic identifies a PDF link farm with 24 external links, predominantly hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same redirector URL. The combination of a deceptive lure and malicious redirector links strongly suggests a phishing or social engineering attack.

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=christmas+party+invitation+templates+funny
    • https://static.usrfiles.com/ugd/8a419d_cce1e74b872c47509ded7ac6da0dc803.pdf
    • https://static.usrfiles.com/ugd/469aea_115464114d2f459d98546a1ef8c22f93.pdf
    • https://static.usrfiles.com/ugd/e73fea_fa9a04971a1348938a7dfda13d4b2517.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e866402209b4a83b948a68f0bf0a07d.pdf
    • https://cdn.shopify.com/s/files/1/0433/3646/6590/files/synonyms_brief_report.pdf
    • https://static.usrfiles.com/ugd/fdee49_13e564aae0044058a3bae9ce6217e0a2.pdf
    • https://static.usrfiles.com/ugd/f09a9d_1d4a721bcf0849c49a7d6c19fd5d19d7.pdf
    • https://static.usrfiles.com/ugd/f90bad_a8d34bb0ee62496cb3dc8c9a9bba3bd6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/11956810266.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0959/files/gustavo_almadovar_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/dudukigaxopedav.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1703/files/falepiwer.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_off000059fb.bin
e9cd77f8e733115ba9c1379d98c263630b83d05afb8d6522b6fc10f44aa812e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FB 5208 bytes
font_01_sfnt_off00006b8d.bin
251cdd49575f025d3fe1de9c1768e6d4e8f7ec6c32b941402a93a8754d553338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 10292 bytes

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