Malicious PDF — malware analysis report

Static analysis result for SHA-256 205b900f0ae8a347…

MALICIOUS

PDF

35.3 KB Created: 2020-08-28 21:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c5a77bbc420fb4488ac28581aff8904 SHA-1: 55d79290ad2e4d6a77b9a2fff516c96e16c9bc4d SHA-256: 205b900f0ae8a3479afebea66dc4ef049ce58cb80a8cb104e1ce55649a457b04
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 external links, a technique often used for SEO poisoning or to distribute malicious content. One of the URLs, https://ttraff.ru/wix?keyword=c%2527est+pas+sorcier+l%2527eau+%25C3%25A7a+coule+de+source, is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other links hosted on static.usrfiles.com, suggesting a coordinated effort to lure users to malicious sites.

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=c%2527est+pas+sorcier+l%2527eau+%25C3%25A7a+coule+de+source
    • https://static.usrfiles.com/ugd/b8c837_4c41bea29aba489cbd092bdc608078f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e20110fd41f4636b6ca4aa6395a8683.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ecafe7353ed4ead9ff7b02385f5eb06.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f33da28321c406381cb980a03448b05.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f54dcd7a6aa41818db7af5c9f301ed3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22341427f8f4d27855f576d3dc0180f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c31ce49a0a824c0f8d57fbc53cc4e974.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/xumavelariraxibujit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/coronary_artery_disease_risk_factors.pdf
    • https://static.usrfiles.com/ugd/b8c837_21cc0cae5a5d426ca3d9d6962460034b.pdf
    • https://static.usrfiles.com/ugd/b8c837_91bf990c28404a6b84c79293ed3236f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://static.usrfiles.com/ugd/b8c837_703ffef223da4f76a51eb4bc49d24e1d.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_off0000499e.bin
fbda1c1a28847d6ece165e3fbd62355c7f414e90db8c480560eb2f98d649035f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x499E 5188 bytes
font_01_sfnt_off00005b0c.bin
0c82abc3b39cb3c35ef44157927ff14209a4eaf3d33220da8233854c209694f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0C 11048 bytes

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