Malicious PDF — malware analysis report

Static analysis result for SHA-256 d776adde17a3d59a…

MALICIOUS

PDF

48.3 KB Created: 2020-08-29 22:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3624bc99668196d577df2a69d23eac47 SHA-1: 313a95befffdc5a46c4d701593fd7a365c11ea27 SHA-256: d776adde17a3d59ae2bca057e084b9e7ef0b12fa47e0110c315a351367689bfa
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=blood+circulator+ost+naruto+mp3'. Additionally, it exhibits characteristics of a browser extension or update lure, instructing the user to install something to view content. The document body, though heavily obfuscated, also contains the same malicious URL and numerous other PDF links hosted on Shopify, suggesting a link farm for SEO manipulation or distribution. 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.ru/wix?keyword=blood+circulator+ost+naruto+mp3
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/greeley_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/balanceamento_qumico.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/nakud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/19284245085.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/meravufukodudawiza.pdf
    • https://static.usrfiles.com/ugd/b8c837_74d49489ccae40119cda99f384d04bb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_de3c9db0f874497da0122ed0da29be62.pdf
    • https://static.usrfiles.com/ugd/8b2c09_9b5ebfec44464f8e83e6af5a833fd91e.pdf
    • https://static.usrfiles.com/ugd/b8c837_6109d0da593947988d5a3197125eb307.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2326bf082a4b47879fbc8d03a44528.pdf
    • https://static.usrfiles.com/ugd/5b9365_dc952652aca848a8957f7f20a16d24a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://static.usrfiles.com/ugd/b8c837_7da82f6427a9455cb57451b4981f93d3.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/57801852123.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/wokulevijuremazufexafidax.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/konejuwevekukawurolobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/pigagidusirakeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/nurigirobifos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053cf.bin
f2cbb7961e2cb1b42a461f6bfda6d8645deaf1fd295b28e60056b9d8dc1d3a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CF 4648 bytes
font_01_sfnt_off0000640b.bin
20140ea147a1785db97a44c04841d6806c7b8b5df3d2f719b023eabf596437a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5432 bytes
font_02_sfnt_off0000765f.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765F 1800 bytes
font_03_sfnt_off00007eed.bin
70bfd7dfb06083d78b057a720380b6bf9012bf6ecb449c5d89cacaee5242f602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 18696 bytes

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