Malicious PDF — malware analysis report

Static analysis result for SHA-256 777dd1b4a9eee633…

MALICIOUS

PDF

35.1 KB Authoring application: Pdftk
MD5: d910e9b23a09b4bc2c4c8b0832c7263f SHA-1: 967af85e7573196948ef27af42c7ff9e538192d6 SHA-256: 777dd1b4a9eee6331bd0319f646ac6e2d20ddf99e5e26421ce920f07a3d909ca
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output strongly indicate malicious intent. The primary function appears to be directing users to a network of external sites, likely for phishing or to distribute further malware.

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://rem5vrlab.com/uploads/1/3/0/3/130324236/6428173.pdf
    • http://zepefix.myopros.tech/uploads/2020/01/28/e95c3c146a.pdf
    • http://mydbcommunity.com/uploads/1/3/0/3/130379272/80e1b983210bc.pdf
    • http://wag.painttech.store/uploads/2020/01/29/3cd437807b.pdf
    • http://yoyotk.com/uploads/1/3/0/4/130483244/d41200dff2.pdf
    • http://nuwidori.gamehighlights.fun/uploads/2020/01/28/kafodogos.pdf
    • http://rnnext.net/uploads/1/3/0/2/130272921/ad318300e3e01.pdf
    • http://recreationlifestylehealth.com/uploads/1/3/0/5/130539244/vegejoduvejedo.pdf
    • http://xipene.kaz24.com/uploads/2020/01/29/kelik.pdf
    • http://pegipava.iamhasan.com/uploads/2020/01/28/vawakopubexof.pdf
    • http://vertes.com.sg/uploads/1/3/0/6/130604179/82f6ed.pdf
    • http://nerusako.pideli.icu/uploads/2020/01/27/641960.pdf
    • http://jobs-kuechenhandel.org/uploads/1/3/0/2/130273850/583621.pdf
    • http://wisevifad.preventus.ru/uploads/2020/01/28/6625785.pdf
    • http://fakoxidide.osbert11.com/uploads/2020/01/27/7a78e3e5baba55.pdf
    • http://josefulgencio.com/uploads/1/3/0/6/130603922/wefuraxusuveku-ledulona-sobivedoruvomob-jarejibagedu.pdf
    • http://doxidunire.dutrocheff.com/uploads/2020/01/27/446846.pdf
    • http://akcab.com/uploads/1/3/0/3/130313150/xatovelevi_dowuvojozegem_katudiw.pdf
    • http://skyhyinternational.com/uploads/1/3/0/3/130313221/rafomisikuxobo_sadajidomekesad.pdf
    • http://evaairways.org/uploads/1/3/0/2/130289523/287857d1e1f0.pdf
    • http://nuwage.net/uploads/1/3/0/6/130621106/nisukozekuge_felux.pdf
    • http://kdspropertysolutions.com/uploads/1/3/0/5/130589276/sedowevunix-taretexi-pokazilemeg.pdf
    • http://beyondbeliefthebook.com/uploads/1/3/0/5/130538838/tofirajikuxa.pdf
    • http://kilo-kings.com/uploads/1/3/0/2/130289580/5419a4c4d2aa.pdf
    • http://reboundat.com/uploads/1/3/0/2/130291552/130291552.html#rajesh+cherthala+flute+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000171c.bin
dfbc81bd176e6c02ed65532a5bb5cbe2c294009180307a4eea39c7ff396c11b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171C 8088 bytes

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