Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84d987d57e52aca…

MALICIOUS

PDF

37.6 KB Created: 2020-08-22 06:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d4c836d4af30a918f9183b9813019b0 SHA-1: 2502f6309e1009a124bca48794dc84fbeb15a08c SHA-256: e84d987d57e52aca4b4dccf73f161efc7f3bbf044895faa912cbc3b398e26aad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a document about 'technology in education'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to lead users to external, potentially malicious, sites. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=technology+in+education+pdf
    • http://vovubesav.shoppingfortoday.com/uploads/1/3/1/4/131438324/ridogawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/pexuzoferoso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/murareboposal.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/process_of_qualitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/76829257513.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/dutelulokevo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/72237244693.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/anestesia_regional_intravenosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/mubakemegekopatexebofufa.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_off000058ad.bin
4307e6f4d27ef1344033218e51b263f9afce08d5ecd5f343909f9bfa8a41cb3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 5192 bytes
font_01_sfnt_off00006a59.bin
6301902715c86ef68917de55788a84f48ac71d8a65a6be3ac57e501647366fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 9372 bytes

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