Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d278795fa3d6a2…

MALICIOUS

PDF

40.0 KB Created: 2020-08-08 21:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acc440c499aa199d3e502871db33c786 SHA-1: a35c29450044edb9e82a5e0b259434721446bd52 SHA-256: 34d278795fa3d6a2599758f33407e543f51d1b3834751a3d61425efac9405f16
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The primary malicious URL, https://ttraff.cc/pify?keyword=properties+of+rational+and+irrational+numbers+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a lure to download or view a PDF.

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=properties+of+rational+and+irrational+numbers+pdf
    • http://files.jeffersonswcd.org/uploads/1/3/1/4/131406234/699157d.pdf
    • http://files.jasmyntea.com/uploads/1/3/1/4/131437593/8902045.pdf
    • http://files.icleanservice.co.uk/uploads/1/3/1/4/131407315/5fff2b1e.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/70592809322.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/51694316522.pdf
    • https://cdn.shopify.com/s/files/1/0432/7106/1660/files/public_finance_regulations_tanzania.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/jdk_8_features_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1402562920.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/finadevujenemeguzom.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/vudinosuvivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/pre_algebra_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/7382/9032/files/dark_souls_2_victors_stone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/sarisuzewuvefovivowen.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_off00005d46.bin
4f4146f84e0a9fe05e9deeb4cc6a2ba7912c617df0056e9ee4c4b9872738eab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D46 5328 bytes
font_01_sfnt_off00006f40.bin
3947f3d76f9028ce8f4ed7e7845f3b334decf4f2ab6449e59076944f2f8dbd9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 10556 bytes

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