Malicious PDF — malware analysis report

Static analysis result for SHA-256 c315a22f04d1ee1e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 03:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79ab6ede8a6c767ea0398557f8a30a33 SHA-1: 1d9f33eae8fa58bfaf2035ed24f63d432683cbf6 SHA-256: c315a22f04d1ee1e03df85eeaa5d9c58d5309cfff13d9d6c81cfbbb89127f578
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the URL https://ttraff.cc/wix?keyword=mass+effect+d20, which is flagged as a malicious redirector. The presence of numerous links suggests a link farm or redirection strategy to lure users to malicious sites.

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=mass+effect+d20
    • https://static.usrfiles.com/ugd/d9d1f5_797da56d280a435ea6c301923de01081.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c3ed30593944dfab658a37850a33e9.pdf
    • https://static.usrfiles.com/ugd/fe83c3_074bf474629c4d599583d06ad8eb0a5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6454569ec054182aca7b573c3613ff6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5e7532acd834927954ba1f8fc693b8f.pdf
    • https://static.usrfiles.com/ugd/fd3290_82c06af270a74346bba064e825c71bc6.pdf
    • https://static.usrfiles.com/ugd/cdb50c_62146aa13f10490495ab35c61cd3159f.pdf
    • https://static.usrfiles.com/ugd/735189_9a25bd13a19b4ee0bfbf049ccca72855.pdf
    • https://static.usrfiles.com/ugd/ca32a8_b4adae285898475faab1de2dd8bde719.pdf
    • https://static.usrfiles.com/ugd/73cb9e_3539e63be7514c50bbbcdc978f1f77fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_c7151b146081438db569de236f6cf398.pdf
    • https://static.usrfiles.com/ugd/b48b60_68df843981f44d54af9f1b014428beea.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_off00005def.bin
fed403266f11e4d3417ead091b3a18595e37b1c2bd28e6069f04bc28eef68e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEF 5164 bytes
font_01_sfnt_off00006f95.bin
a61db013ab0ab51d91827efea6c7a9a4039517ae929965e345af2bc9434f8c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F95 10692 bytes

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