Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b57045218b246e…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 01:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8bfa9830a50ed780c7f756042f38b3f SHA-1: f7f833935a94748837525fe3697f4b9838bffdf9 SHA-256: 37b57045218b246e5c4b9a6fad0dfa111efe3df06d2b573ba74377003e10a2c5
180 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including a critical finding of a PDF redirector link to a known malicious domain and a PDF link farm. The document body, though heavily obfuscated, contains text referencing 'video er free for google chrome' and includes the malicious redirector URL. The presence of a browser extension installation lure and a callback phishing lure further supports a social engineering attack. The primary attack vector appears to be directing users to a malicious URL under the guise of free 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.
  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.link/wix?keyword=video+er+free++for+google+chrome
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/dukonaxu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/formulating_adhesives_and_sealants.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/puparijobamepef.pdf
    • https://static.usrfiles.com/ugd/4117a9_4f170738d8d34145a355707a7d14024c.pdf
    • https://static.usrfiles.com/ugd/aff7ca_eec8f45eb37243c0a8c92d1d1749bcaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1bded44bc649df9930a58778dcf501.pdf
    • https://static.usrfiles.com/ugd/625844_a1b06a6ce9db4e2aaf27c7a040e3770c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/tamutedizoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59577082877.pdf
    • https://static.usrfiles.com/ugd/de02f3_f3d7fbc3424142fdbca6388572fbbdd6.pdf
    • https://static.usrfiles.com/ugd/0adedf_8c48646aaec44013b5f10c6f0d129a60.pdf
    • https://static.usrfiles.com/ugd/43d598_dea6057ad23a426683ab0b2c73719d19.pdf
    • https://static.usrfiles.com/ugd/f0e51d_5b432d10af004a399af4da614a3d2146.pdf
    • https://static.usrfiles.com/ugd/f0e51d_6826f1a8e8d14db69ba8dad0c39b45de.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_off00006035.bin
3c19f774deaec531d8231c97a76ba22f37a21c5531416f25c1f5658f0feb94e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 5012 bytes
font_01_sfnt_off00007120.bin
543c25a5b40769e4b2b4c96fad8ea6c9cc6ca85c0ade08720bade056d521df21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 10352 bytes

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