Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b8ba9435cf564e…

MALICIOUS

PDF

37.0 KB Authoring application: SWFTools
MD5: 8a74c90c8ef1736624d2abe420ca949d SHA-1: 472b183ea1724b4c1ab07bd2983ec3810bab3a38 SHA-256: d3b8ba9435cf564e66ee382ea61e1ccfa5731dd8cf0de2da33ab3f38ab0065bb
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to direct users to multiple external PDF documents, a common tactic for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports a malicious intent. The document body, though partially corrupted, attempts to disguise its malicious nature by offering "Weekly budget worksheet free printables". No scripts were extracted, limiting the analysis of specific execution behaviors.

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://monuwesar.svea.pro/uploads/2020/01/28/72106b20.pdf
    • http://camphopeless.io/uploads/1/3/0/6/130622023/4bba0.pdf
    • http://bigben.site/uploads/1/3/0/5/130545199/1967179.pdf
    • http://zedogowas.labdo.net/uploads/2020/01/28/wetelane.pdf
    • http://cyclebavaria.com/uploads/1/3/0/2/130289745/130289745.html#weekly+budget+worksheet+free+printables

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001006.bin
db6e8f05ccb44bab8785ff16ac007b606da7d2b74e555a8a1ce0b57ced6f65d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1006 8464 bytes

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