Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b40a925550af3d…

MALICIOUS

PDF

43.4 KB Created: 2020-07-27 23:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdeec045cab28806083993761891a077 SHA-1: 8e5f1a79c61233f5fbf58ca0cf7af3899766d623 SHA-256: d3b40a925550af3de841f90718cd9908b56ad6ad7b6b2552b305a34438d3d33b
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://ttraff.cc/pify?keyword=best+android+samsung+tv+remote', is flagged as a malicious redirector. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites. The ML classifier also strongly indicated maliciousness.

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=best+android+samsung+tv+remote
    • http://files.moonlightairfoundation.org/uploads/1/3/1/3/131379567/c7506e54324e.pdf
    • http://files.invention-info.com/uploads/1/3/2/3/132302995/54a17bd.pdf
    • http://files.gersongirls.com/uploads/1/3/0/8/130874085/8898792.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/xorilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/defaxisumivot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6819160869.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/47701113658.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/rovox.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/71485284504.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/pokobipelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/27203458212.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/14022994598.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/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4b.bin
06f05c578333b568b7d986a98ecf5529debff831d0a53664964e8793d039eb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 5104 bytes
font_01_sfnt_off00007d91.bin
75e03b64de39f95195b4ad052dffb7fd07a9dce41f5eea787ec01762abe129bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D91 10192 bytes

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