Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0b16539c64c4d0…

MALICIOUS

PDF

41.7 KB Authoring application: Smallpdf Desktop
MD5: d9a45c5576765b981fcbd2bec1ae6721 SHA-1: c369cb5c7adc95054b67d0814f214c3517079693 SHA-256: 8f0b16539c64c4d003d43d0279e2659840a242ccdf964fc4a86d38405dd9d992
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The document body, though truncated, mentions 'World countries and capitals pdf download', suggesting a lure to potentially malicious content hosted on numerous domains. The primary attack pattern involves redirecting users to a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://clickpayservices.com/uploads/1/3/0/5/130589156/7900f.pdf
    • http://myrichardsonrealty.com/uploads/1/3/0/2/130270775/xereda_lulatal.pdf
    • http://mta-sts.1ezschool.com/uploads/1/3/0/6/130603959/sokiluvufowup-badale-winewipoboleku.pdf
    • http://stalvanjaarsveld.nl/uploads/1/3/0/5/130551656/zinitekibujobix.pdf
    • http://www.egweimaikale.com/uploads/1/3/0/2/130287837/sotixelana_vetobidi.pdf
    • http://littlebutfierce.org/uploads/1/3/0/4/130475918/9455820.pdf
    • http://safebeautymovement.org/uploads/1/3/0/2/130273993/c2fdd3784.pdf
    • http://saimithraimpex.com/uploads/1/3/0/5/130550777/4807970.pdf
    • http://nelsonmassage.com/uploads/1/3/0/6/130604958/dopefivuranida.pdf
    • http://deborahdion.com/uploads/1/3/0/8/130813997/05d5c4c94c1e.pdf
    • http://skiesoffire.us/uploads/1/3/0/2/130274091/nesukupab.pdf
    • http://silkroadsourcing.co/uploads/1/3/0/5/130589070/2410219.pdf
    • http://www.sweetmaddies.com/uploads/1/3/0/6/130605278/59073bf606.pdf
    • http://qnek.net/uploads/1/3/0/5/130550929/280900.pdf
    • http://goonmud.com/uploads/1/3/0/7/130740492/zajaweja.pdf
    • http://orlandoforeclosurelaw.net/uploads/1/3/0/5/130545249/e6018802e7a29ec.pdf
    • http://ivv-americas.org/uploads/1/3/0/6/130620233/fubiris.pdf
    • http://litem.net/uploads/1/3/0/5/130590588/3197150.pdf
    • http://atmosferevents.com/uploads/1/3/0/6/130621405/c1d460e.pdf
    • http://socalasta.voyagerwebsites.com/uploads/1/3/0/7/130739962/130739962.html#world+countries+and+capitals+pdf+download
    • http://goonmud.com/uploads/1/3/0/7/130740492

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033fc.bin
750c92fa1db5810c6de6b1040e9c0837d38486580b44de1cde3f2eb8b8040d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33FC 6664 bytes
font_01_sfnt_off00004775.bin
258b5a9474790f1bba3894fbae0c806b9562f9327042002f378f4fadd6759330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4775 7780 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.