Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66b862b07b25dfb…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 06:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba072ca32141bc6f685498f505606396 SHA-1: 2e453f2bbdf721ec8da961f5d13f3e4317b3b3b8 SHA-256: c66b862b07b25dfbc5f10598ddb00c10fa176ec1aef2db87153b3cbe702ccac0
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to educational worksheets. This indicates a social engineering attempt to lure users to malicious infrastructure. The PDF also features a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. No scripts were extracted, but the presence of multiple embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

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.ru/pify?keyword=ordering+decimals+tenths+and+hundredths+worksheets
    • http://fuwil.soarohio.org/uploads/1/3/0/8/130874113/jabaxosotelibo-mavitudul-volagexijufor.pdf
    • http://files.labelmediva.com/uploads/1/3/0/9/130969681/7458942.pdf
    • http://files.pirsig.org/uploads/1/3/1/3/131379320/gifise.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/space_oddity_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/bowigaxigodegivivu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/30634725789.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/pedialyte_nutrition_facts.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/xenedexujifokugebo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/54854982645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/ledaxiberogabexiwaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/59653204164.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/44592184108.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c87.bin
ad58f83b1bacc7c28f1ae95c62312da0e11ba54cf730ca4093783c6ad6abc920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C87 5420 bytes
font_01_sfnt_off00006ed3.bin
d1f9587641c4628a43192143634966c6fbd90cbec64fe99af911f93620c296f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 14660 bytes
font_02_sfnt_off00009c43.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C43 4324 bytes

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