MS Publisher border
application/octet-stream
Magic Bytes
Offset: 0
5A 4F 4F 20
Microsoft Publisher Border (BDR) is a proprietary resource file developed by Microsoft Corporation for use within its desktop publishing application. These files serve as graphical component libraries that store pre-defined decorative edge elements and border designs used to structure page layouts for newsletters, brochures, and flyers. As a legacy binary format primarily associated with older software versions, it contains static graphical data and presents minimal security risks compared to modern macro-enabled formats.
Validation Code
How to validate .bdr files in Python
Python
def is_bdr(file_path: str) -> bool:
"""Check if file is a valid BDR by magic bytes."""
signature = bytes([0x5A, 0x4F, 0x4F, 0x20])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .bdr files in Node.js
Node.js
function isBDR(buffer: Buffer): boolean {
const signature = Buffer.from([0x5A, 0x4F, 0x4F, 0x20]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsBDR(data []byte) bool {
signature := []byte{0x5A, 0x4F, 0x4F, 0x20}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/bdr
curl https://filesignature.org/api/v1/bdr