public class samplepdf1 {
public list<account> accountrecord{get;set;}
     public string accountid{get;set;}
    public account acc{get;set;}
 public samplepdf1(ApexPages.StandardController stdController){
 accountid = ApexPages.currentPage().getParameters().get('id');
   this.acc = (Account)stdController.getRecord();
    }    
    public pagereference save()
    {
             upsert acc;
              savepdf();
        // send the user to the account to view results
        return new PageReference('/'+accountid);
    }
    public PageReference savepdf() {
    PageReference pdf = Page.samplepdf1vf;//new PageReference('/'+accountid);Page.samplepdf1vf;
    // add parent id to the parameters for standardcontroller
    pdf.getParameters().put('id',accountid);
    // create the new attachment
    Attachment attach = new Attachment();
    // the contents of the attachment from the pdf
    Blob body;
    try {
    // returns the output of the page as a PDF
        body = pdf.getContentasPDF();
      } catch (VisualforceException e) {
        body = Blob.valueOf('unable to get content as pdf');
    }
    attach.Body = body;
    // add the user entered name
    attach.Name = acc.name+'.pdf';
    attach.IsPrivate = false;
    // attach the pdf to the account
    attach.parentid = accountid;
    attach.ContentType = 'application/pdf';
    insert attach;
     return null;
  } 
}

<apex:page standardcontroller="Account" extensions="samplepdf1">
  <...>
        </apex:page>