Malicious PDF — malware analysis report

Static analysis result for SHA-256 d896bd389e0885fd…

MALICIOUS

PDF

86.5 KB Created: 2020-08-06 22:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ff1420d94fa52f127441f81bb9cdc3 SHA-1: f81eb827d816996975e84c5ca0bb393dc1b22830 SHA-256: d896bd389e0885fd5e0ec848dbcd2c90537141ee58464a0ae35535cf9b940bbf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.ru/pify?keyword=principles+of+islamic+banking+and+finance+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Principles of islamic banking and finance pdf' and the wkhtmltopdf application, suggesting a lure to download a seemingly legitimate document that instead leads to malicious 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=principles+of+islamic+banking+and+finance+pdf
    • http://files.visionprintmedia.com/uploads/1/3/0/7/130739063/1d970.pdf
    • http://files.detourtowonderland.com/uploads/1/3/1/3/131378950/3277927.pdf
    • http://files.fusaroconsulting.com/uploads/1/3/1/0/131070762/6427218.pdf
    • http://files.ajukmapparel4.com/uploads/1/3/1/4/131482823/fe3fb682.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/nibamajusokogat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/1655446077.pdf
    • https://cdn.shopify.com/s/files/1/0451/0508/6616/files/medical_laboratory_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8278/files/esmo_guidelines_breast_cancer_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/12257967515.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/nursing_jurisprudence_exam.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/reliability_analysis_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/3936121532.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/71964237452.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/kebebunemeputupatogavex.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_off00011609.bin
ce9435d92fe3f1ba3e9bd07107d8a575a8ce2e90509696ef3ab0ca87ac1130b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11609 5680 bytes
font_01_sfnt_off00012944.bin
714ac6bc59dbd66921fc01ab104e4332d14b451c93bbe39284425f71e57839f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12944 10304 bytes

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