Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeaf2ba3c2a2031…

MALICIOUS

PDF

37.8 KB Authoring application: Nitro PDF
MD5: f2d7fba45e7c9bdc9d5a6c416f666022 SHA-1: 4782d9af0cfcc3c06422fef50bc3955176b67e42 SHA-256: 4aeaf2ba3c2a20315ace3cc1e54207c08b90f6562f7543338da4671bdb8e2ec3
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links pointing to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic detected a 'PDF_SEO_LINK_FARM'. The document body, though partially corrupted, contains references to 'Kingdom Hearts 1.5 level guide', likely a lure to entice users to click the malicious links.

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://rixaz.niletube.com/uploads/2020/01/29/e79ecb25.pdf
    • http://curtisgifted.com/uploads/1/3/0/2/130288768/292f34720.pdf
    • http://bukegi.osoznanie.online/uploads/2020/01/27/sopipuguxewi-senubupe.pdf
    • http://mufevi.toysrobocar.ru/uploads/2020/01/27/xoxatujakeb-fowisadamebomup-zubalugewijezu.pdf
    • http://ludesupe.pnptogo.com/uploads/2020/01/28/1326554.pdf
    • http://kentuckymountainproducts.com/uploads/1/3/0/6/130604222/3445643.pdf
    • http://772holly.com/uploads/1/3/0/5/130588693/gevez.pdf
    • http://beingself-centered.com/uploads/1/3/0/3/130312974/130312974.html#kingdom+hearts+1.+5+level+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001176.bin
209fdfac72950d1d07d596a1dc1d5e059c61719a2e2207503f518c83ed8a272d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1176 8404 bytes

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