Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bab680c73a6de39…

MALICIOUS

PDF

61.5 KB Created: 2020-07-31 02:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a19c5c19b963943b978e4ccfa1b76352 SHA-1: 8ff221c636c6385524d5a887b7fdc12c8c56f1d5 SHA-256: 3bab680c73a6de397b8d31401db82953745e10d24efbc9469a571785fc932854
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Bronchopneumonia case study pdf', suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to potentially harmful content via the 'ttraff.com' URL.

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=bronchopneumonia+case+study+pdf
    • http://files.embeddedresearch.org/uploads/1/3/1/4/131437087/jomopib_luzejufumagun.pdf
    • http://files.dawnanntotten.com/uploads/1/3/2/6/132696018/mizikox-tapixas-lavaluxuxele.pdf
    • http://files.integratedbodymind.com/uploads/1/3/1/4/131408899/362880.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/lazelupugeleko.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/jakupuseme.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/fevawusurobejutew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/65408393482.pdf
    • https://cdn.shopify.com/s/files/1/0434/6875/0998/files/xofidaniforub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/nodujavelavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/vetuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/38359795603.pdf
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/55321366756.pdf
    • https://cdn.shopify.com/s/files/1/0440/4147/0117/files/26970509660.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/29304914475.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/66902918651.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/1/0434/6875/0998/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b340.bin
9b1128831e8e161a9ffc66f366591ae6534e094e95bfe9fcb86e2495aa4a3659		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 5396 bytes
font_01_sfnt_off0000c56a.bin
1d148bae235a28050e9d6715e0c37a884399c625093b7416f085a3b683d57282		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC56A 10560 bytes

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