Malicious PDF — malware analysis report

Static analysis result for SHA-256 653a86db49da6b2c…

MALICIOUS

PDF

80.5 KB Authoring application: GIMP
MD5: 463e2c2313228a35b87124be1d6a0c76 SHA-1: be9a39c70ffbd9fd68251619d4a3699dc2eeb184 SHA-256: 653a86db49da6b2caf319bf16cdb2b6c6c682ba530de01d366688ade56bb5fbb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to further malicious content, potentially involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ashtonproperties.com.au/uploads/1/3/0/5/130541327/xubat-maxolif.pdf
    • http://gamor.thewunderland.website/uploads/2020/01/28/1263339.pdf
    • http://leoeandhyde.com/uploads/1/3/0/5/130551267/5966388b1ad55b.pdf
    • https://gufibisara.weebly.com/uploads/1/3/0/3/130380037/vejip_xaganakiwol_fogesozinikaxak_kunodelat.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/7/130739956/130739956.html#canadian+food+guide+1+year+old
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001130.bin
9081fa552af72d2c02b551e940cde13fb69eac11f7e72c78efb74e4c6b7cb502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1130 8860 bytes
font_01_sfnt_off00006545.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 16068 bytes

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