Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d4067da7c4a841…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 12:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 164f9fb984e599fe9f6767b0c43eea5b SHA-1: ca3572ced4406f507e1de5fa6252595e18ac1282 SHA-256: b3d4067da7c4a841e7d23530d9a8d3507170e67985b9b7f1c69dd4cd21e69680
200 Risk Score

Malware Insights

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

The PDF file contains a link farm and a lure related to purchasing an 'invisibility cloak'. This is consistent with social engineering tactics to trick users into clicking malicious links. The primary malicious URL identified is ttraff.cc, which is flagged as a redirector. The document body, though heavily obfuscated, contains the same lure and URLs, reinforcing the phishing attempt. The presence of multiple links to static.usrfiles.com suggests a link farm used to distribute the malicious content.

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.cc/wix?keyword=invisibility+cloak+for+sale
    • https://static.usrfiles.com/ugd/696b8a_1b190fa3e5e347878e9f28c26f048a25.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_37f569238fc8483d8892ac58545ca03a.pdf
    • https://static.usrfiles.com/ugd/ab922d_1746cad7de6241929465ddcc77bdd6f5.pdf
    • https://static.usrfiles.com/ugd/7ff653_88bc1f361573486ca64b7e40607fc676.pdf
    • https://static.usrfiles.com/ugd/aec2ea_26178cec568d4221983db054e8adc6fa.pdf
    • https://static.usrfiles.com/ugd/b98abb_2d969f0f8b4c48948ec1b6b171783077.pdf
    • https://static.usrfiles.com/ugd/89c6ad_e001cab8a49c4a22bc15708fbcc04a00.pdf
    • https://static.usrfiles.com/ugd/fd30ac_6847f0e259114e0ead7c7add546a43b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c39f011f4a049c9b1d73c99b5015e88.pdf
    • https://static.usrfiles.com/ugd/68ec51_c161e7b941b84c5690b92d8f871e959c.pdf
    • https://static.usrfiles.com/ugd/6f7357_e5faf0de67a240cbb7c13bdec0af6553.pdf
    • https://static.usrfiles.com/ugd/1a89c8_215e2e7f0c0341c3acd3c4340ffd772f.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_e02424bd5a46409fba4adcd1010a4190.pdf
    • https://static.usrfiles.com/ugd/5e8de6_54531ac786cd4d7cab7372a657a61b89.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_off00005789.bin
4be94972c60c930ec0965537e172908d0c77830c5836822d90531897b6d75031
pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 5180 bytes
font_01_sfnt_off00006937.bin
d8b752cf492056289448f342d4e2f10a78f8f73590ceaf0ba8f5fd0125e12f27
pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 10360 bytes