Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98a877152b8beea…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 00:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd448b16c3195ef45ea146aba5ee0ff SHA-1: 948e90fb26b93da9a187b03f1e7543f08e185367 SHA-256: a98a877152b8beea07e0d99c20d832a3b2e873b9954d6b473a83a4cb1f822699
120 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, pointing to 'https://ttraff.com/wix?keyword=archer+queen+upgrade+cost'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to 'static.usrfiles.com'. The combination of these factors indicates a phishing or redirection attempt.

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.com/wix?keyword=archer+queen+upgrade+cost
    • https://static.usrfiles.com/ugd/eb5a6a_a49f2e13de41481e90d553f606cfa48f.pdf
    • https://static.usrfiles.com/ugd/71fd01_825e8fe03d15486d86dfb47e764eafc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed71f763ab1042cc98a3aa668a8935ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf389887f0244118b4bec65dfc8c4ee2.pdf
    • https://static.usrfiles.com/ugd/fedf23_6358ea23c5c84accb714c5479b53ab74.pdf
    • https://static.usrfiles.com/ugd/aef5b7_409d2b6559244c5ba80e359d4063a09c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2321/files/5962043073.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/wow_vanilla_enchanting_guide.pdf
    • https://static.usrfiles.com/ugd/71fd01_138c790ec0b74fb7951082d203ce9205.pdf
    • https://static.usrfiles.com/ugd/b8c837_b598d61539d341b69596c25235f27f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4956cd0a6c44faac8d2f66fbb55a3b.pdf
    • https://static.usrfiles.com/ugd/8ba634_f0a15bd712c142a1819077b673daa124.pdf
    • https://static.usrfiles.com/ugd/63022f_a72f4d5e10034cddb04ee6d542f7f80c.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_off00005f72.bin
078c0be31f858d04cfedb3de914e80c88a292763a35fb8c0864283ecef14ad88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 5416 bytes
font_01_sfnt_off000071c9.bin
2b2cfcdf202e31f3ff53f992020daf55af93b37539278ce68878512c00a11915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 10516 bytes

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