Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3e43ea0917280d…

MALICIOUS

PDF

40.6 KB Authoring application: Inkscape
MD5: d9c18b75b726965cf24f9498d3c6fc35 SHA-1: fca0190b6f55ef17f8d2152f3fc87745a5d1f499 SHA-256: 5a3e43ea0917280d0216f82ab2fdeb47a274e9406d92e0169a2410f596fc5cbd
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, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, though heavily obfuscated, contains references to URLs that are also listed in the extracted URLs, suggesting a coordinated effort to redirect users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://aikosilkart.net/uploads/1/3/0/3/130324390/7516498.pdf
    • http://xoj.technologysolutionsandsupport.com/uploads/2020/01/28/e27c79fc.pdf
    • http://orrefors-camping.weebly.com/uploads/1/3/0/5/130588678/bopisinoxeneb_zosexagititesij_rupizulunid.pdf
    • http://anatoly-nikolsky.com/uploads/1/3/0/3/130313345/zukupigorapewirix.pdf
    • http://swarmstudios.com/uploads/1/3/0/5/130588239/bopabab.pdf
    • http://jazzheartjazz.com/uploads/1/3/0/4/130435914/2781925.pdf
    • http://smph.agency/uploads/1/3/0/6/130621163/4651327.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/7/130738848/130738848.html#curriculum+vitae+design+template+psd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117f.bin
d077b76fd9d1077bce45d3d0bb7a02844e6b246afdbed218661e7260e2f329a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F 8316 bytes
font_01_sfnt_off0000638f.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 2652 bytes

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