Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddfff887a43f727…

MALICIOUS

PDF

47.5 KB Created: 2020-08-16 20:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d51a18f423da4c78d724a82e76ba5899 SHA-1: 25f9fc7f06672e032c19ac6eaf2c37f87f32b9d0 SHA-256: 6ddfff887a43f72726a8c4a2d4d9a8765e43047776fa0ac4d95eba663eb63b87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDF files, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=flat+escort+card+template
    • http://files.wkuprecollegepiano.com/uploads/1/3/1/4/131454620/320e47ffbd60e2.pdf
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • http://tageleg.withbecca.com/uploads/1/3/2/3/132303382/mutekukadurewag-mowowedes-zidat.pdf
    • http://files.srmfd.com/uploads/1/3/1/4/131437513/gakumezaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0024/8995/files/xagutu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/gemakabirawosotexow.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/mugedapiwam.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/andrographis_paniculata_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0438/0560/6049/files/98063574627.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/wumojuniruta.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/17111983200.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/pdf_to_word_converter_online_free_full_without_email.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/nisikiwunolulutupowen.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/61805201197.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/80726486212.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005544.bin
15e4ae7f11d096ad5f3325c51767458d78ab206e67949fe2898ec060989b8ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5544 5176 bytes
font_01_sfnt_off000066b9.bin
5e155986507b40f2fee7ab2860be79af4eba925040a6564c6488e8f54b5bd26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 2984 bytes
font_02_sfnt_off0000729d.bin
768662d9175752b7fa74d41f5aa9ee3ab1664b1d6be541edb98abbdf874d6406		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729D 12344 bytes
font_03_sfnt_off00009b72.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B72 16164 bytes

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