Malicious PDF — malware analysis report

Static analysis result for SHA-256 25700f62ae4231ad…

MALICIOUS

PDF

64.4 KB Created: 2020-08-23 02:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b04c5f5b3f5976a1a851da6b3ce029 SHA-1: 36c797359b0eb1f6bcc82ac1b0832326d354f757 SHA-256: 25700f62ae4231ad7230fe3c2c74c5b07b641b2f9e38b6567ee70bb250b5a2c2
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Psoriasis guidelines canada' and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, suggesting a phishing or scam campaign. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

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=psoriasis+guidelines+canada
    • http://files.lippsstix.com/uploads/1/3/2/7/132741551/5312261.pdf
    • http://files.maggieessig.com/uploads/1/3/1/4/131437733/joleteziwero.pdf
    • http://mokeju.eartharkbotswana.com/uploads/1/3/1/4/131483245/5513673.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1706/files/9788817949.pdf
    • https://cdn.shopify.com/s/files/1/0450/0714/3076/files/hebrew_alphabet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/13754708320.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/nupoxumaromor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1404/files/accounting_terms_definition.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/html_to_angular_7.pdf
    • https://cdn.shopify.com/s/files/1/0452/5791/6577/files/51358684208.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/kinesics_and_context.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/dominio_linguistico_ser_bachiller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/basic_electronics_and_communication_engineering_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/jazujoxidetamewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2202/4867/files/32259262837.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/assinar_com_certificado_digital_a3.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_off0000bf93.bin
92f1b63447d0613cac09f3e513ebe78a7a74426b817d523d4f9e97f8c00f77ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF93 5108 bytes
font_01_sfnt_off0000d0fa.bin
07ab736f53f049dd6fc8a287645a8e7ffc3f8782292c5e93b4ca8299f30e4c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 10520 bytes