Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4da6485a7d4caa…

MALICIOUS

PDF

36.5 KB Authoring application: PDFBox
MD5: 9dd36873698aae2f3ec4b76a0296d180 SHA-1: 105965b58c70c8ce93bd53363bc34aaf5f72f759 SHA-256: 2b4da6485a7d4caa15f8a5aae55b14f9d1fbcdcfc2355cd1b25c334220c2aed2
150 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 commonly used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body's mention of 'Happy birthday gift image' is likely a lure to entice users to click the malicious links.

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://elliefernandez.com/uploads/1/3/0/3/130313557/2896441.pdf
    • http://artispira.com/uploads/1/3/0/4/130476048/xigovexakefirafiw.pdf
    • https://zitavezib.weebly.com/uploads/1/3/0/2/130288549/garid_zufidofiloxigo_kanafevidewibo.pdf
    • http://mrallenscience.com/uploads/1/3/0/5/130545698/sekizopaputilaje.pdf
    • http://dmusdinnovation.org/uploads/1/3/0/5/130541073/7450363.pdf
    • http://bctee.com/uploads/1/3/0/4/130477566/0023358.pdf
    • http://poxevoj.gesscsverde.site/uploads/2020/01/28/7533663.pdf
    • http://lunaparkstudios.net/uploads/1/3/0/2/130291328/zisigubidarili.pdf
    • http://misterkolani.net/uploads/1/3/0/5/130590209/d82d745785b.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/4/130483413/130483413.html#happy+birthday+gift+image

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001206.bin
4a7ea630aa8875498ec2873136322036cffc49dc3845729d4fb45971c97882d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1206 8084 bytes

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