Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9f04b5ff6f1caa…

MALICIOUS

PDF

46.9 KB Created: 2020-07-30 09:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b84a37f258377ce2f16f468ae15b8287 SHA-1: d7307b117c41915cd82f6f28a0f2ece1c42c3f2e SHA-256: ee9f04b5ff6f1caaf1dd78c47d4a2f2f7f4c36a76d1e6b86a8af6ef608aa1715
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to cloud storage, and the presence of multiple embedded links indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=ventajas+y+desventajas+del+almacenamiento+en+la+nube+pdf
    • http://files.southdakotaagriculturallaboratories.com/uploads/1/3/2/7/132710783/42c42ec.pdf
    • http://files.yourstoryunfolded.com/uploads/1/3/2/6/132681634/vavowuzexiler.pdf
    • http://files.donnadeforbescreates.com/uploads/1/3/1/0/131070165/1842442.pdf
    • http://files.onsiteexpeditions.org/uploads/1/3/2/8/132814680/966d53361.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/vovetobuligiluw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/38682386873.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/xegofuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/68992813704.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/91535267814.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/89354810649.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/75411483881.pdf
    • https://cdn.shopify.com/s/files/1/0428/1237/5207/files/kuwosobuxovafifudokok.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/75353538159.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dd0.bin
cb0d2028d5a816b15d61183e3254615e0559dd8ac8494494f02ce7714383feb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD0 5428 bytes
font_01_sfnt_off0000803c.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803C 1800 bytes
font_02_sfnt_off000088ca.bin
81f75ed57ea05cd56f37008d48d87cc3aa4f2123a4a363818a653ad76a1b2e49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88CA 10832 bytes

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