Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5fab3d002b0583…

MALICIOUS

PDF

39.4 KB Authoring application: PDFedit
MD5: 2aa1c306de0ba1988ec48c875e569b86 SHA-1: e375fc4727738e47598f1931d093b718fcb55e33 SHA-256: 3d5fab3d002b058333c6ab447134dfcc59d7cf744678feb0c6f7623cf75c65ea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with 18 external PDF links, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support malicious intent. The document body, though partially corrupted, contains references to song titles and metadata that appear to be a lure to disguise the malicious links. The primary attack pattern involves redirecting users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://xaki.gamehighlights.fun/uploads/2020/01/28/5cbd5c706f9.pdf
    • http://jutageva.danilorojasmendez.tech/uploads/2020/01/29/5155879.pdf
    • http://citizens-medicare.com/uploads/1/3/0/6/130639599/dasux.pdf
    • http://adimef.com/uploads/1/3/0/4/130435536/letedojo.pdf
    • http://camdenauctions.com/uploads/1/3/0/2/130270743/2326539.pdf
    • http://xekenefave.kubrinsk.ru/uploads/2020/01/29/e17c93.pdf
    • http://arteltiles.com/uploads/2020/01/28/6346f2d.pdf
    • http://totiguki.oftsinwiltit.pro/uploads/2020/01/28/9181878.pdf
    • http://cfirthwssu.com/uploads/1/3/0/6/130604581/7058799.pdf
    • http://djspizza1.com/uploads/1/3/0/5/130588984/130588984.html#vicky+d+parekh+beti+song

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011af.bin
03a0001101f7f44b52ad53e8fa1da9a61e7d747ef699a3a02c360ba8527907f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF 8440 bytes

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