Malicious PDF — malware analysis report

Static analysis result for SHA-256 21baaef861e8c6cb…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 04:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c00c7c74c26555b3d4d02fb1135867df SHA-1: 23961713977303c828a74b9342474e8eb8a28739 SHA-256: 21baaef861e8c6cb0a58eeb541fa713ad0821b772da4730a96405ced2e2de135
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate this is a PDF link farm, likely designed for SEO manipulation to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=turnigy+accucel+6+80w
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/cristalizador_evaporador_de_circulac.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/simple_business_plan_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7916/files/ganifaboxez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/kejajixelifozokosidid.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/61460363626.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/systemic_inflammatory_response_syndrome_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/64640010054.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/short_and_long_term_memory.pdf
    • https://static.usrfiles.com/ugd/b8c837_483394ee66ae42fe82a0d3b3a35fe1b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb377fbcc0aa4913a95afa6f52839b05.pdf
    • https://static.usrfiles.com/ugd/9b33c5_93600d8ff220420aaadc267b51c3c833.pdf
    • https://static.usrfiles.com/ugd/b8c837_cad9da7fa409402b9399a38ecaa6359b.pdf
    • https://static.usrfiles.com/ugd/74c34a_cc6b6a74b9e04384bd55ed2fd49e0759.pdf
    • https://static.usrfiles.com/ugd/de65f7_c787e55535bd48c394064cd1676a4e48.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_off00005a6d.bin
1aa5c5fe23d25b6b2517badd4099e1852655328c57c5301904264073b4c4ba0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6D 5424 bytes
font_01_sfnt_off00006cf9.bin
d23548102ad205e4ae879ad2e2cb68d112358e45b8477a0fa0cdc1819fa3ada9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 10092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.