Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ef87c1d264bde2…

MALICIOUS

PDF

36.9 KB Authoring application: Adobe PDF Library 9.0
MD5: ac4b407c759643db9ec928c7d8bfa35c SHA-1: 042537e11e32b42439e8b719889f109517f5a9ed SHA-256: 57ef87c1d264bde29dbed12d917271f3cb2d839d7234c4b5f5aebdd4a29ac007
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm. This technique is often used for SEO poisoning or to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support the malicious nature of this document.

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://deficientautobiographicalmemory.com/uploads/1/3/0/5/130590656/0b2734e73d.pdf
    • http://webdisk.pleikuab.com/uploads/1/3/0/6/130604682/e2b4a4a.pdf
    • http://connecticutflyboard.com/uploads/1/3/0/7/130739120/9733170.pdf
    • http://cisna.org/uploads/1/3/0/2/130289333/f1a6df2.pdf
    • http://pauldini.net/uploads/1/3/0/3/130323430/9634424.pdf
    • http://beachumbrellarental.com/uploads/1/3/0/6/130604599/nunakixen-domididisi.pdf
    • http://smokebrushfoundation.net/uploads/1/3/0/3/130313224/javumip.pdf
    • http://vudumedia.net/uploads/1/3/0/5/130545537/vutivixef.pdf
    • http://theultimatecruiser.com/uploads/1/3/0/6/130621809/0a33ce6caff2b7.pdf
    • http://ashlandfenceco.com/uploads/1/3/0/5/130551081/zimoriba.pdf
    • http://rumble-records.com/uploads/1/3/0/5/130544734/dopisibij.pdf
    • http://sqeda.com/uploads/1/3/0/5/130589252/1264689.pdf
    • http://ergoly.com/uploads/1/3/0/4/130476244/mugufuvevafof_rakukadavisat_xoxidagib.pdf
    • http://magicvillageyards.devsite-1.com/uploads/1/3/0/7/130740178/130740178.html#present+perfect+simple+and+present+perfect+continuous+explanation
    • http://rumble-records

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003842.bin
e290bd783f1df828574b18fe18f6de6bdf2a45044ea52f6da778ab39110d2999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3842 7712 bytes

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