Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9a3c90aac729fd…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 03:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0a839b67d104d2c506285e0bc51659 SHA-1: 845e0ea7a02b97c37790619cbc3c1bf1d15f7705 SHA-256: 7e9a3c90aac729fdcacc89f495846348c4cae9a285bf8329357757139bedccbc
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.ru/wix?keyword=corazon+espinado+tab. The document body contains garbled text but also includes this URL and several other PDF links hosted on static.usrfiles.com, suggesting a coordinated effort to distribute malicious content or phish users. No scripts were extracted, and the document body was largely unreadable.

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=corazon+espinado+tab
    • https://static.usrfiles.com/ugd/b8c837_d160ce30a08f43b8a5703c44dd9143de.pdf
    • https://static.usrfiles.com/ugd/4b874d_e3b054297a8b4e22afd1772a9c79b49f.pdf
    • https://static.usrfiles.com/ugd/f14cf6_9ed2967130bb407d99565cf00a779b84.pdf
    • https://static.usrfiles.com/ugd/b8c837_2834814971b8414ca577aa28b115deb1.pdf
    • https://static.usrfiles.com/ugd/d902bb_b1d98c9a2d854a19af617c1790cfe186.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa9ca426d15349f3a5bc093628f85eeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_762c991ad3ae411daa45a39b55d58654.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/lirevevipu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/14554621501.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/fuwasaxozenosadike.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/bendable_concrete_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/html_to_npm.pdf
    • https://static.usrfiles.com/ugd/b8c837_1222179c8d6948a5a40eb6c91c9f5962.pdf
    • https://static.usrfiles.com/ugd/44b221_a6f332d209b44c2992558dc5a4d7f6c7.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_off00004f85.bin
9efd9a042b265b6238d0757df621052b59785c43038c1c6e53b4acff58bde085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F85 5016 bytes
font_01_sfnt_off00006097.bin
eaf8c408a57aed39902e840e4d405f421e468cca89a6c7bc503e0ca691be3ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 12404 bytes

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