Malicious PDF — malware analysis report

Static analysis result for SHA-256 83590946653a326b…

MALICIOUS

PDF

50.6 KB Created: 2020-07-30 20:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69415e17f4d5ff5f7127f025db8d0efd SHA-1: 31039ecac5de0ddd6bca353a8a4ce428575519d0 SHA-256: 83590946653a326ba042cd7c300da496c5ab031aafcd0ff1548f44fbc68b54b3
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or redirection strategy to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains text related to downloading a PDF book, aligning with the heuristic findings of a link farm and 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://ttraff.ru/pify?keyword=caballo+de+troya+libro+pdf+descargar
    • http://files.blenkinsopleathers.com/uploads/1/3/1/8/131858044/c890a.pdf
    • http://files.magicsdreamescapes.com/uploads/1/3/0/7/130739802/9057010.pdf
    • http://files.alexoconnor-onlineportfolio.com/uploads/1/3/1/4/131438348/aa734.pdf
    • http://files.mpbnews.org/uploads/1/3/2/6/132681201/6221910.pdf
    • http://files.blenkinsopl
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/mupevixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/9095006264.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/magovapali.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/miwibewitusonezid.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/46723616635.pdf
    • https://cdn.shopify.com/s/files/1/0433/9387/6118/files/21895064929.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/zojid.pdf
    • https://cdn.shopify.com/s/files/1/0428/6146/1670/files/zibenepobavujaneno.pdf
    • https://cdn.shopify.com/s/files/1/0432/1650/2939/files/86587313105.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/selal.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_off00008410.bin
64e848827519cc8f18eb3c11a52996a995d30a40b6e62c50f2638c7afe361dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8410 5272 bytes
font_01_sfnt_off00009618.bin
a1571b86996019fc246d4c7646a917a9e2ad97c35cc4a229a74e8dcfe9e0ead6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9618 11540 bytes

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