Malicious PDF — malware analysis report

Static analysis result for SHA-256 87349233c23c58ee…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 20:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ea880fe290f9937dc6be66dfb261378 SHA-1: 214c047d36173258bc6ab1163b29034b7546a29a SHA-256: 87349233c23c58ee075161f86ee7ac7bd825cc24f62cee8aacf44dc12ea7ca20
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The presence of a 'download button' heuristic and the document body containing a URL further supports a social engineering attack. The primary malicious URL identified is ttraff.ru, which likely serves as a gateway to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=biostatistics+and+epidemiology+smoller+pdf
    • http://voxibedob.melshand.com/uploads/1/3/1/6/131606407/7d6a6f65ee0.pdf
    • http://mazesejit.barbiescookies.com/uploads/1/3/1/4/131407406/9212591.pdf
    • http://files.therapymcb.com/uploads/1/3/1/8/131856574/xopakukuxoguri.pdf
    • http://busiziz.arlenespiegel.com/uploads/1/3/1/8/131871721/kufurijiter_fuxodatizozuda.pdf
    • https://cdn.shopify.com/s/files/1/0443/3005/7884/files/advanced_algorithms_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/79990084495.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9605/files/99436613336.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/bepaxolapubenape.pdf
    • https://cdn.shopify.com/s/files/1/0433/8378/3575/files/91611094524.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8333/files/42989691091.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/ripik.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5020/files/73049240848.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/suzezodofowobiwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/php7._2-_fpm.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_off00006574.bin
77fbc22e451937ad666c51896592f99e4dc67b02827a93f247d36bb095698e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6574 5624 bytes
font_01_sfnt_off00007891.bin
64ee1b3cf4c9b66c0056c5e10a09cbb6962899fcf68ef7db0117c72863d38d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 9980 bytes

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