Malicious PDF — malware analysis report

Static analysis result for SHA-256 309507ccd62866ef…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 22:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a28125710dfa7c157729e20e148c2ce7 SHA-1: 9a4822ffc1b90969b5aa6019707e50bc006ea6c2 SHA-256: 309507ccd62866ef95627284f839f8010e5010f9904ba386221ec185016021a2
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=lost+in+space+parents+guide+2018', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the final malicious destination. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=lost+in+space+parents+guide+2018
    • http://files.yairlivnat.com/uploads/1/3/0/7/130738666/797511.pdf
    • http://files.uae350.com/uploads/1/3/1/4/131453401/firoj.pdf
    • http://files.cuauhtemocmurphy.com/uploads/1/3/2/6/132682913/kajedokaxabix_vijov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/povixugobasar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/21769291751.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/pibulozuruwolusixunukep.pdf
    • https://cdn.shopify.com/s/files/1/0449/7879/8750/files/operadores_mecanicos.pdf
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/12826695003.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/kavoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/sositewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/29252904769.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/66569819968.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/32972608904.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/gold_platform_shoes.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/kamav.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_off0000622f.bin
713ba14c2ef551d2eafa36a796c33600580837feb4d8c83c76dfc5f99202b6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 5668 bytes
font_01_sfnt_off00007585.bin
531789e087afbd71bb49ae26696ece826844af626ce82be9c9368896dcbfe9b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10212 bytes

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