Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfebde011cb960a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 02:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 596cf0f0e35a1db33588f292d0aea12d SHA-1: 540a2e017d281c47266f61dfdf43582dd23631f0 SHA-256: cdfebde011cb960a45a9513f4cf31b7f7e648aee457e95ace6f753f94d9fd8f1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL. The primary malicious URL identified is https://ttraff.ru/wix?keyword=crazy+russian+hacker+age. The document body contains garbled text and the identified URLs, suggesting a lure to a malicious site. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=crazy+russian+hacker+age
    • https://static.usrfiles.com/ugd/b8c837_2a1f5c131d9f4c5cbc50b2a8917f02dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_95420d694e0a40de886ba18e1d17b003.pdf
    • https://static.usrfiles.com/ugd/b8c837_78cd4f74243e408f9c66f44989c6029f.pdf
    • https://static.usrfiles.com/ugd/b8c837_617fdbd2671548e68497e571a57e0c68.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c2275576d54cdbb059520f99d8ca0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dd76032c2fb4879846c6c50cf3f39df.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97a4c2bb7ae48c3aba4fe4fdf46d109.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/90570103405.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/tukixaxavibabimudul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0095/4021/files/bothell_reporter_best_of_northshore.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/pectoralis_major_myocutaneous_flap.pdf
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/70845839553.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/basic_economics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5270/files/vista_128fbp_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/9195515098.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_off000064e1.bin
1cc96c8bb0872984e70d0e48611d9fa1dee37793ee2ddb79ce568bd996e7588d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 5152 bytes
font_01_sfnt_off0000766f.bin
6d59a80c66fd76a35a023b2eaded67c300b513b1a34f7d3b4862a0cee8b993de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766F 11692 bytes

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