Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ca0a01e7eb065f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 11:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 699c6060c9d88116111c416798535db3 SHA-1: e5f2b1896282dabbdda19d35d28e2fc4252049de SHA-256: 47ca0a01e7eb065f3ac088eb1bba03451e42e9533f19d07d878228d77c0ca9ed
128 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document body, though heavily obfuscated, contains text related to 'spacedesk not working' and a URL that appears to be a call to action. The presence of a link farm heuristic further suggests an attempt to distribute malicious links. The primary attack vector appears to be social engineering via a malicious link disguised as a troubleshooting guide.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=spacedesk+not+working
    • https://static.usrfiles.com/ugd/9219f8_0e7b730e0d184e40976904863037aefc.pdf
    • https://static.usrfiles.com/ugd/ca32a8_8ea58da9aee741d6ac4727e2cbb31a6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2d3ad00f82e41b29ca32be804017d62.pdf
    • https://static.usrfiles.com/ugd/a382ee_6938818f6c8b4009b72db3968c8779cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1ac3b661c8f48688e38482448d49d01.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d357304b4334150b5375a31558dc5a5.pdf
    • https://static.usrfiles.com/ugd/430cb2_08b0f1795d2e4c2caf0f68a6ab9a0430.pdf
    • https://static.usrfiles.com/ugd/68ec51_121a29add8ea49e4a7313525aa65d22f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aab9125c07940f88d7cef672e60a019.pdf
    • https://static.usrfiles.com/ugd/87a178_9279059bc1004b5faa4dbbcf0b2f34b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e5cf08febb645f4a86526b1eacced81.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e48e6ace5ee48cfb4859bc2255ecf25.pdf
    • https://static.usrfiles.com/ugd/b8c837_0048c07d6de746819895bb2a129e6ea6.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_off00005d37.bin
f991ec7f3fd780331aca16bba3ffb38f1ae9d07d65bcd054d37efe8159782401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D37 5468 bytes
font_01_sfnt_off00006fe9.bin
28964e60b5309aa42045461c76c14fe273f384ef997f49223cd2af77a4665582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 10416 bytes

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