Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cc6f15488f9019…

MALICIOUS

PDF

41.9 KB Created: 2020-09-14 04:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ae80f0913109240b7314488d47c3f55 SHA-1: dd0d53e9e43b186498007b2897896bffb6ea3a30 SHA-256: c2cc6f15488f9019837d9e32725dbe3b5a31c9f41af6271fd6efa5c42134d59e
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, characteristic of a link farm. The primary malicious URL identified is https://ttraff.link/wix?keyword=epic+seven+gear+farming+guide. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the link farm attack pattern. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=epic+seven+gear+farming+guide
    • https://static.usrfiles.com/ugd/6350c7_a8c8b1943e954385be0245f692030304.pdf
    • https://static.usrfiles.com/ugd/e6092c_fa704c0c25754940ac892439a721e8db.pdf
    • https://static.usrfiles.com/ugd/83f04e_9dc54a20841c4157bd437f37f85465ba.pdf
    • https://static.usrfiles.com/ugd/dbbfd0_e4026d32f3ca4996bfa609b3972182ba.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/lipoferafagaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/4732/8664/files/88091853833.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/bachianas_brasileiras_5_guitar.pdf
    • https://static.usrfiles.com/ugd/f63f29_e813638e47d24a80823081644c2b678f.pdf
    • https://static.usrfiles.com/ugd/e4ff69_d2c3fc145e284fecadd5430c99782b39.pdf
    • https://static.usrfiles.com/ugd/d48fe3_c75a0d1f01ce4950bc970867fd1ec428.pdf
    • https://static.usrfiles.com/ugd/1f6d71_5f88c0c219894badacdb88b31ecf7c03.pdf
    • https://static.usrfiles.com/ugd/c4f63d_62b9ec08eebd405a8f2bd516fa43d413.pdf
    • https://static.usrfiles.com/ugd/d6af85_7413caf901394a12a0fda75cb5c3f50b.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_off000064c9.bin
f9f90cc14d4225395b62e5f569676d87fd7de93711e4c118446d41f932cc47a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 5460 bytes
font_01_sfnt_off00007753.bin
45b7a889b955214301fa37deced276e295662be460149df55bac931e90a90558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 10456 bytes

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