property |NSURL| : a reference to current application’s |NSURL|
property PDFDocument : a reference to current application’s PDFDocument

set aHFSPath to (choose file of type {"com.adobe.pdf"} with prompt "Choose a PDF with Form")
set aPOSIX to POSIX path of aHFSPath
set aURL to (|NSURL|’s fileURLWithPath:aPOSIX)

set aPDFdoc to PDFDocument’s alloc()’s initWithURL:aURL
set pCount to aPDFdoc’s pageCount()
set firstPage to (aPDFdoc’s pageAtIndex:0)

set anoList to (firstPage’s annotations()) as list
if anoList is not equal to {missing value} then –指定PDF中にAnotationが存在する場合のみ処理
　　repeat with i in anoList
　　　　set aName to (i’s fieldName()) as string
　　　　
　　　　if aName ends with "Check Box" then
　　　　　　set aState to (i’s buttonWidgetState()) as boolean
　　　　　　if aState = false then
　　　　　　　　(i’s setButtonWidgetState:true)
　　　　　　　　set bState to (i’s buttonWidgetState()) as boolean
　　　　　　end if
　　　　end if
　　end repeat
end if

–PDFの保存先のファイル名を入力させる（あらかじめパス文字列を作成しておいてもよい）
set newFileName to POSIX path of (choose file name with prompt "Input File name to save")
if newFileName does not end with ".pdf" then
　　set newFileName to newFileName & ".pdf"
end if

–フォーム内容を変更したPDFを指定のパスに新規保存
set pdfRes to (aPDFdoc’s writeToFile:newFileName) as boolean