Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab12f05a23518da…

MALICIOUS

PDF

40.1 KB Authoring application: Smallpdf Desktop
MD5: 67af809b11a04012184be20e83632f98 SHA-1: 7a8ca96f856b25c245a023f42aafd26051a5f8ce SHA-256: 3ab12f05a23518da09bd401535dfa695512e97a515e82c990512c20507acd839
120 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded external links, indicating a link farm likely used for SEO poisoning or directing users to malicious content. The document body contains garbled text and references to 'Ethyl acetate sds merck', suggesting a lure to disguise the malicious intent. The primary attack pattern involves directing users to download further PDF files from the listed URLs.

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://mobile.streetsmartyouthproject.org/uploads/1/3/0/5/130538937/nisokorewamano.pdf
    • http://webuxe.flowito.com/uploads/2020/01/28/senoxajepogaxes_benep_notugirirudekak.pdf
    • http://stjeromewestchester.org/uploads/1/3/0/2/130270811/verumokevegew_girixum_tidubim.pdf
    • http://trustnews.me/uploads/2020/01/27/4754687.pdf
    • http://mhcsi-bath.com/uploads/1/3/0/2/130271099/533333.pdf
    • https://dapizekabakeva.weebly.com/uploads/1/3/0/3/130379094/bijufa.pdf
    • http://nepetem.moo.moscow/uploads/2020/01/27/famevafu_nisazosurupe_tebubakagox_netekesajufamo.pdf
    • http://splashlondon.ca/uploads/1/3/0/6/130621233/nugafiwiveni_bupax_kuzaroda.pdf
    • http://naxogim.tahocentr.ru/uploads/2020/01/27/9669204.pdf
    • http://kimbirka.ru/uploads/2020/01/27/vavelesadadowoz.pdf
    • http://richmondhouseclay.com/uploads/1/3/0/5/130588494/ef1721c8df1b09.pdf
    • https://gegifukomi.weebly.com/uploads/1/3/0/5/130543239/7523730.pdf
    • http://tovadokon.whoisthatvoice.com/uploads/2020/01/28/lafesonimi_kuxoda.pdf
    • http://torikayharris.com/uploads/1/3/0/5/130590278/7319890023.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/2/130289346/130289346.html#ethyl+acetate+sds+merck

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000143c.bin
26e827137a73fa15680288376fa43a9bdcd3d3410fe072d768093961a8a127b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C 8800 bytes

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