Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dcc664636ab3b8…

MALICIOUS

PDF

34.8 KB Created: 2020-09-29 21:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5772301435bccc3dabacb58192207d7e SHA-1: 7ff414f5140c4824ebabb2dc0edbda39523f5420 SHA-256: e9dcc664636ab3b8b85f5f001acfe93c082bb8a72727f1e42ccc8f6efe584915
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The document body, though heavily obfuscated, contains references to 'Ray Bradbury books pdf' and URLs that appear to be part of a SEO-based link farm strategy. The primary malicious URL identified is https://cctraff.ru/strik?keyword=ray+bradbury+books+pdf, which is flagged as a known malicious redirector.

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://cctraff.ru/strik?keyword=ray+bradbury+books+pdf
    • http://files.edsolutionsofcharlotte.com/uploads/1/3/1/3/131379639/wuxafijanepoji_kifoxebinekigob_zetabu.pdf
    • http://files.phocrystal.com/uploads/1/3/1/4/131409693/943678.pdf
    • http://libarok.jamesbaylee.com/uploads/1/3/0/7/130776824/015a837.pdf
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdf
    • http://suzijo.mybaremelanin.com/uploads/1/3/2/6/132682646/5205627.pdf
    • http://files.holycrossyonkers.org/uploads/1/3/2/7/132712505/fasotal.pdf
    • http://files.followthepathtoyourart.com/uploads/1/3/1/3/131383743/fce5a28f.pdf
    • https://cdn.shopify.com/s/files/1/0481/4943/0425/files/apk_true_skate.pdf
    • https://cdn.shopify.com/s/files/1/0462/6389/4173/files/kasofujapizutibavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4118/5189/files/saxejoboduma.pdf
    • https://uploads.strikinglycdn.com/files/daae2161-85cd-4156-bc56-0f454461f692/35751918231.pdf
    • https://uploads.strikinglycdn.com/files/7732039c-7be8-4850-8715-ad9e9fa27d72/potijetumafifutijekisuxu.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_off00004c0b.bin
b0d619dbabbea8537485d6948280ed3b3ea24b0832445d4114ae57c0817354e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0B 5316 bytes
font_01_sfnt_off00005e38.bin
be3f1e6d4b5e7c6ad5f3abaed6f350366727e4368041704fe0dc257d4e945556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 9492 bytes

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