Malicious PDF — malware analysis report

Static analysis result for SHA-256 52968808d1f8e04c…

MALICIOUS

PDF

65.9 KB Authoring application: ImageMagick
MD5: c1984983acc74aea3e00780f1d40e6e8 SHA-1: 100d11b8555d995d76792d94b8db11ad6bf2f024 SHA-256: 52968808d1f8e04cd8abdcb732718b99e899e90646bf53e471609c3893774ba4
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier. The primary heuristic identified a large number of embedded external links, suggesting a link farm or redirection mechanism. No scripts were extracted from this sample, and the document body contained mostly binary data and a reference to 'Acute pancreatitis pdf 2019'. The embedded URLs are the most actionable IOCs.

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://porthardylaundry.com/uploads/1/3/0/5/130539048/3d03905d6634b40.pdf
    • http://beatdiabetesnow.org/uploads/1/3/0/8/130873983/debuwarofolobo-xezegolidodo-kixigefemaveza-gunano.pdf
    • http://glowingmermaids.com/uploads/1/3/0/2/130272606/6510202.pdf
    • http://cristawadsworth.com/uploads/1/3/0/4/130478882/bidavepiludu.pdf
    • http://www.stjohnlutheranruma.com/uploads/1/3/0/8/130814559/debat.pdf
    • http://akpartnership.org/uploads/1/3/0/2/130289662/laxupum.pdf
    • http://optikstudios.io/uploads/1/3/0/5/130588973/guwonixa_lawiju.pdf
    • http://i85local.com/uploads/1/3/0/7/130775257/lapegoko_jazejopevupig_wedusawawezi.pdf
    • http://arroyo-grande-counseling.com/uploads/1/3/0/6/130620889/gegewij.pdf
    • http://iboart.be/uploads/1/3/0/5/130588545/572152.pdf
    • http://nw9.me/uploads/1/3/0/3/130379368/bae2064cd9353.pdf
    • http://clothingvn.com/uploads/1/3/0/6/130620893/b9b5e51e.pdf
    • http://bianxingjingangzhenren.br3h.com/uploads/1/3/0/5/130590435/130590435.html#acute+pancreatitis+pdf+2019

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000136a.bin
edbe4165a3e2fc3aa3dad7d2280e9d4ba2859e42b92dca6c9d49206b942c26f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136A 8808 bytes
font_01_sfnt_off0000bd26.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD26 16036 bytes

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