PDF malware analysis — malicious · 4a3d22c3b75ec345

MALICIOUS

PDF

59.0 KB Created: 2020-07-28 09:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c3b22daf767f1ff876033f66489bf66d SHA-1: ba1769201b8d0ec1bafa3ea4da603cc387323135 SHA-256: 4a3d22c3b75ec3452d854f5b944ad055a644ef6eb75c2c76c82fe45d68d3ddea

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to external resources, a technique often used to obscure malicious destinations. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'online instructions and guidelines', aligning with phishing or malware delivery pretexts. No scripts were extracted from this sample.

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=ctcae+v3.+0+online+instructions+and+guidelines
- http://files.tsipimani.com/uploads/1/3/1/1/131163736/8896440.pdf
- http://files.associazione-camelliarubra.org/uploads/1/3/1/4/131453540/6142359.pdf
- http://files.handcraftersbarn.com/uploads/1/3/2/8/132816165/8eb2eb59.pdf
- http://files.equatorial-intraseasonal-oscillation.com/uploads/1/3/0/7/130739084/87f7d893cd5.pdf
- https://cdn.shopify.com/s/files/1/0437/2873/2314/files/41824866454.pdf
- https://cdn.shopify.com/s/files/1/0435/9749/6477/files/wanizirabadotemewuxa.pdf
- https://cdn.shopify.com/s/files/1/0430/3175/6957/files/94010742507.pdf
- https://cdn.shopify.com/s/files/1/0434/2281/0268/files/togam.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
- https://cdn.shopify.com/s/files/1/0434/7055/3238/files/jujokotejeweberumogareto.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
- https://cdn.shopify.com/s/files/1/0430/0315/0499/files/xafotapowerezojomupo.pdf
- https://cdn.shopify.com/s/files/1/0431/3504/1702/files/xatigolasexopeji.pdf
- https://cdn.shopify.com/s/files/1/0428/6981/7511/files/92556345602.pdf
- https://cdn.shopify.com/s/files/1/0432/7545/2569/files/17054620009.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00009259.bin` `e8e127ba31d3c60f82ad5eca29c002fd58ebe82b2dc2a8df9831498dffb7564d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9259	5412 bytes
`font_01_sfnt_off0000a4c6.bin` `ad566f016264590845d5135bf12e9e9656249679047fd8cb86fc8b709f423a28`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA4C6	10504 bytes
`font_02_sfnt_off0000c8d4.bin` `2783b27bdad0ea490eb257d9925c605908c92de4f0a2d3163d52617c63ef321a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8D4	16156 bytes

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