Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dba13afc3db9a6b…

MALICIOUS

PDF

47.9 KB Created: 2020-08-29 09:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec3593247743c5cdbcdd8fc75412292 SHA-1: 06a75add691b8d4a6a9ef1bf7ff182bb6d8a0161 SHA-256: 7dba13afc3db9a6bdbb3ab0c654878b3289b6c868df3ddcc38362767b2b75941
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=dungeon+defenders+2+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf' being one of the first identified. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the lure.

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=dungeon+defenders+2+guide
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c8c73af705e405ab11aaf9e478b56bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3a022e49e44449db2e330a55a377e53.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/5644455868.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/xasejisepatukab.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/vetasasagipana.pdf
    • https://static.usrfiles.com/ugd/b8c837_d30451c2fdc94a17bab4053ddaa076ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a46cd2058f24d57ba087cc2f542a0bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e7a86fa69c4d9eb9c52e1113801517.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d73cf8433204135b91e152131b56768.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a1fdaf07c544e83a416e2293de105f8.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_off00007ef1.bin
925e117d7ccc5340a3ec3974c03fd25484a54db4bee354f417fff694de24fc9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 4964 bytes
font_01_sfnt_off00008ff2.bin
2ccdac9c9525205415015685ac402cea3341a8e82aa4c358315c436feee7ed63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF2 10332 bytes

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