Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d51fb84ae785d9…

MALICIOUS

PDF

43.0 KB Created: 2020-09-05 13:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1841db13eef204ff72690a74f549b4d SHA-1: d4101bdd8bcb8f23353c717bfa3c0c56de76d1b5 SHA-256: 30d51fb84ae785d95865c68f44c5fbbc357481792dca1f0812fb15146f33ba11
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=camstudio+8+free++full+version'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on static.usrfiles.com. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick the user into installing something, which aligns with the redirector's purpose. No scripts were extracted from this sample.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/wix?keyword=camstudio+8+free++full+version
    • https://static.usrfiles.com/ugd/5f4192_02f3d4ee32594e3497d24c2da55e23aa.pdf
    • https://static.usrfiles.com/ugd/d3758e_98b55508ff2c4d29b9170b09221f357f.pdf
    • https://static.usrfiles.com/ugd/2dbf5a_1abd7ab6e7c6461f917304e917311e78.pdf
    • https://static.usrfiles.com/ugd/c5d40f_6f3ed085e16c4a4db9057378025e5afe.pdf
    • https://static.usrfiles.com/ugd/d61b30_530c057763194f2d880aa191e30784f4.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/banifubulowiruxagifi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/61158238650.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/day_night_furnace.pdf
    • https://static.usrfiles.com/ugd/784815_e2a6281aa09b43fbbd1acdb45ae245aa.pdf
    • https://static.usrfiles.com/ugd/ef253e_03597413695543909402bbe38b62a4d8.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_off00006860.bin
b5904cb7d3b4af1f634b4e47479d0a35d860a511dda3ea48b70cae44c827e9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6860 5212 bytes
font_01_sfnt_off00007a08.bin
563476b60b9e13f7ae77201b7d1bf0f46b9bd81ddc1cb251d64f4a033750a029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A08 10996 bytes

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