Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b5a482ef04ed13…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 07:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f6b213bc2698aa681cd571531f161d7 SHA-1: 8250da3a288d3a34dd5e00616819c459c7b984f4 SHA-256: d9b5a482ef04ed1300554b347ba48a5ad99aef92590b1184bf5cd4f19e6fbaec
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to artificially boost search engine rankings or distribute malicious content. One of the embedded links, 'https://ttraff.ru/wix?keyword=clinical+pharmacology+made+ridiculou', is flagged as a known malicious redirector. The document body contains garbled text and what appears to be a repeated URL, suggesting it's primarily a container for links rather than readable content.

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=clinical+pharmacology+made+ridiculou
    • https://static.usrfiles.com/ugd/1c8c6c_75c16c95730143e2b9434f545dc595a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd8539a7c5b848be8d4ab155ebe52973.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df349b8dad545d58ed9b50e11a55cc5.pdf
    • https://static.usrfiles.com/ugd/67e251_804d76045bae4fe38a2ea0b627071c80.pdf
    • https://static.usrfiles.com/ugd/b8c837_683f2d2acf5a4d01bc396865a5358437.pdf
    • https://static.usrfiles.com/ugd/544c7e_001bd733010747fb8bacc0204351e9be.pdf
    • https://static.usrfiles.com/ugd/162fe6_e0aeb546676945a785e8b44afe439775.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/84363747476.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/happy_birthday_jesus_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/guxereputa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0197/files/guluzoxarurabodugudituj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/wijodigezabexukanemopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/physics_equations_of_motion.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_off00006aae.bin
9beae728a2ce99e028ea36344f44c4446aa1e00ad90af503af905916d25c95be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 5316 bytes
font_01_sfnt_off00007c8a.bin
a195968b3138ad30caf03549e2c6872a59f0375cd6549afdf9fd1f354b79dc59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8A 11136 bytes

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