Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c553086cf46722…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 09:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ca0d660eb9eb36225f484055467ea70 SHA-1: 2286a24b137923e7e00394dbf21e927448a599a0 SHA-256: b0c553086cf4672285b1376f2176d86cd1a6ce57144ac36548772fb1a1d2508d
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also contains a heuristic for a 'Browser extension / update installation lure', indicating a social engineering attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or malware.

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.link/wix?keyword=bsbadm506+style+guide
    • https://static.usrfiles.com/ugd/38bf1f_7bc1716233bc46089b127fd7082badd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f200ab4ebdb4b10b98f773635ebf639.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d902eee5824e589dc911f1ba38adaf.pdf
    • https://static.usrfiles.com/ugd/136d07_e53b57a89e604103ae05fae1a31598be.pdf
    • https://static.usrfiles.com/ugd/9e41f0_e427d3cbc40543309cb7461e326c9bcc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9767/files/fejukemitimulokoroselif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/abiotic_and_biotic_factors_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/2d_convolution_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6179/files/su_alteza_serenisima_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/18728498496.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/vuxiremigovudotolesarele.pdf
    • https://static.usrfiles.com/ugd/b8c837_44121cb3184d4762b3b64512f465a8bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae2582386cf4e27979301d401409196.pdf
    • https://static.usrfiles.com/ugd/29c71c_642bcd6f30b543bda681c5e4eb8e36cc.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_off000067eb.bin
4f8836bc02077bee056f3a772cbbef5f6980a8a63a0fb4af64d7e592575ba1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 5760 bytes
font_01_sfnt_off00007b75.bin
ab67233f03656fd7a296aa7d1144ff372e82c86289f7cdd4e3c434581f796eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B75 10096 bytes

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