Malicious PDF — malware analysis report

Static analysis result for SHA-256 3309ee02a78bbf9a…

MALICIOUS

PDF

44.0 KB Created: 2020-07-31 05:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0077dd4f29be4031ab2134968568b9be SHA-1: ca2e5ad609b1bcab65e86b2be56303de749a749e SHA-256: 3309ee02a78bbf9a0d5fe0a1482304af766490633b83aa41f7a9270b612e63c9
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to PDF editing, likely serving as a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify domains, suggesting an attempt to distribute malicious content through a seemingly legitimate platform. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent.

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=how+to+add+text+to+pdf+document+online
    • http://files.beansgreensproteins.com/uploads/1/3/0/8/130813975/62dcd1dcc07ab47.pdf
    • http://files.nhfuneral.org/uploads/1/3/2/6/132682802/parariti_minigijodu_bazizisexuso.pdf
    • http://files.northmesquitechoir.com/uploads/1/3/1/4/131452942/jajebajegogoli-jezuruvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5958/files/97742927449.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/dijowepajot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/82772563506.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/10695686887.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5341/files/95233686812.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/16943139773.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/dozajamilefepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/lilemojewobigeribazexobum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/japatazixo.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcb.bin
869d3766a8d54567c1bcc35cbc3bad80cef57831b93ba583fd219c7ed192ac4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 5032 bytes
font_01_sfnt_off000080ed.bin
4cfb6f91b955bdd121f42a17b3d92a8628134f7d6cd8b5cd8a98f61a06265af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 10004 bytes

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