Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6db4661f5080e7a…

MALICIOUS

PDF

47.7 KB Created: 2020-07-19 03:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d08f42ad9cc452b99e670a9cc5dbdf9 SHA-1: 66820413a78ef3dfc6613d0cef08e1663e9bdb66 SHA-256: c6db4661f5080e7a730b259806ee4f5d6aba980a33b6bb479dd5fc179b9accdc
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to downloading free books. The primary malicious URL identified is ttraff.cc, which is used to redirect users to potentially harmful content. The presence of numerous external links, many hosted on cdn.shopify.com, indicates a link farm strategy to improve search engine visibility for malicious 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.cc/wb?keyword=download%20google%20books%20free%20pdf%20format
    • http://files.qksnd.com/uploads/1/3/1/3/131398194/7325071.pdf
    • http://files.surrenderedheartsnm.com/uploads/1/3/1/4/131454523/valopew.pdf
    • http://files.wc4s.org/uploads/1/3/2/6/132681307/6dbf9b7a40064dd.pdf
    • http://files.qksn
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/33891274548.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/loxiworirurizam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/70890259767.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/mepawagifelur.pdf
    • https://tujozoxi.files.wordpress.com/2020/06/tagajunobotaxog.pdf
    • https://gozinogix.files.wordpress.com/2020/07/96752319663.pdf
    • https://jiwuvef.files.wordpress.com/2020/07/senupesuzaduwinu.pdf
    • https://wesofiviku.files.wordpress.com/2020/07/naxowozakekulixoxosal.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/tenefilik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nuzeluxuredilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/vosoxavewubovuba.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/4965050341.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_off00006e63.bin
a73066ff084e11d16940f7bb1beacb767e47fad5b9dc9b7a74363ae6cc7b1f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 5396 bytes
font_01_sfnt_off000080b8.bin
7c1e61b5cc3d086fbfb2e7624c567e901da5b97812b95d603d368545f5aa7f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 22000 bytes

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