Malicious PDF — malware analysis report

Static analysis result for SHA-256 0023f3915576a75f…

MALICIOUS

PDF

44.5 KB Authoring application: pdf-parser
MD5: e0cf422050feff418e321631be4e819c SHA-1: 1445dd2f6e78a7df2f24d3abd640f57186790d00 SHA-256: 0023f3915576a75f386805d7026fbbec8737f733636c7839ac54790c96772e52
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and a machine learning classifier also flagged it as malicious. The document body contains text related to 'conectores de redaccion en ingles' but is heavily obfuscated and does not provide direct instructions.

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://themarkstaging.com/uploads/1/3/0/6/130604192/79c9e77.pdf
    • http://resibuenasvibras.com/uploads/1/3/0/6/130605230/1288280.pdf
    • http://myshop36.site/uploads/2020/01/28/piwasefamevig.pdf
    • http://claireleisringbuerkcounseling.com/uploads/1/3/0/6/130604639/vuxeso-vajegiweze-famina.pdf
    • http://comprensivocigliano.it/uploads/1/3/0/5/130588572/6851889.pdf
    • http://nvholidaybazaar.com/uploads/1/3/0/2/130287536/6674617.pdf
    • http://nursingarmpillow.com/uploads/1/3/0/3/130379114/130379114.html#conectores+de+redaccion+en+ingles
    • 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_off00001181.bin
45bfa5fb8e54fbd75dd2cb4e396031278b928060b46b46c71c7be7f2c4d87833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1181 9244 bytes
font_01_sfnt_off000066d0.bin
c08ac777639452153101dac67014cd332104efa09ae436b26fdeabd6036b7076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 16380 bytes

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