Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c938533bceab5b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-29 09:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4afad5581b0c1fa4347ed793e18132f4 SHA-1: 4c8d1565629de729c11029b56fd750746d67df26 SHA-256: f5c938533bceab5b9cedcd08fb5cebaf211d17f7c71492a0efc4e0c9585c9a85
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised with a lure related to 'd d 5e exotic weapons'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on static.usrfiles.com, suggesting a link farm or redirection strategy. The primary malicious intent appears to be directing users to the malicious redirector.

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.cc/wix?keyword=d+d+5e+exotic+weapons
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.pdf
    • https://static.usrfiles.com/ugd/b8c837_69a0d0697bae4e819ea50a7c82bbd771.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1392cf124544ada8d2b309ecddaf9ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9027fea6f8a499489be792004840909.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/warrior_bdo_awakening_guide.pdf
    • https://static.usrfiles.com/ugd/b8c837_411da9f96bd64d42b5d9faf7ff2e1b4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_17ae54fe80004408b8329548829847cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_65aa2f66d6584d35a7a53f3cc7ff2be4.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79c79d740554823911661cf23d62af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f39526450b84a16907df117671e9271.pdf
    • https://static.usrfiles.com/ugd/b8c837_520e0afa70a04556820ab16d798d558c.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_off00007010.bin
7415aae9ab6c5cfc7a9190d7cb85da2b3e181fe779fc42a20cb6589dcd635ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 5224 bytes
font_01_sfnt_off00008204.bin
6abf77280e4773aa873653ac6dcb926873e8b1a672200e9c41fbdb2c381a5c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 10468 bytes

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