Hi Neeraj

The path web/content/11442 is handled by this method

@http.route(['/web/content',
    '/web/content/<string:xmlid>',
    '/web/content/<string:xmlid>/<string:filename>',
    '/web/content/<int:id>',
    '/web/content/<int:id>/<string:filename>',
    '/web/content/<string:model>/<int:id>/<string:field>',
    '/web/content/<string:model>/<int:id>/<string:field>/<string:filename>'], type='http', auth="public")
# pylint: disable=redefined-builtin,invalid-name
def content_common(self, xmlid=None, model='ir.attachment', id=None, field='raw',
                   filename=None, filename_field='name', mimetype=None, unique=False,
                   download=False, access_token=None, nocache=False):
    with replace_exceptions(UserError, by=request.not_found()):
        record = request.env['ir.binary']._find_record(xmlid, model, id and int(id), access_token)
        stream = request.env['ir.binary']._get_stream_from(record, field, filename, filename_field, mimetype)
        if request.httprequest.args.get('access_token'):
            stream.public = True

    send_file_kwargs = {'as_attachment': str2bool(download)}
    if unique:
        send_file_kwargs['immutable'] = True
        send_file_kwargs['max_age'] = http.STATIC_CACHE_LONG
    if nocache:
        send_file_kwargs['max_age'] = None

    return stream.get_response(**send_file_kwargs)

So if not found, either the content does not exist or in your case it could be that the content is not intended to me accessible by public user

check the permission of the content you would liek to make accessibel to the public

Regards

Daniel