Malicious PDF — malware analysis report

Static analysis result for SHA-256 36595810e5418691…

MALICIOUS

PDF

41.6 KB Authoring application: OpenOffice Draw
MD5: 203642daa233aecd3c0deaad3ccfc5b5 SHA-1: 5fb6341d03669ca50c8433da302f3a07808381fe SHA-256: 36595810e54186915012835ce73f19f25fd26c28290caa77fa32abf8d20e1090
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, constituting a link farm. The heuristic 'PDF_SEO_LINK_FARM' and ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate a malicious intent to redirect users to potentially harmful content. The document body itself is largely unreadable due to encoding issues, but the presence of numerous external links is the primary indicator of malicious activity.

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://alonsoquintanilla.com/uploads/1/3/0/7/130739502/8b9ed2ab9a337a.pdf
    • http://experiencetrailhead.com/uploads/1/3/0/2/130289460/8620095.pdf
    • http://pewdigital.com/uploads/1/3/0/5/130590219/lurodavi_bedinenusif.pdf
    • http://adtest.site/uploads/1/3/0/5/130539345/4706071.pdf
    • http://wyomingspeechlanguagehearingassociation.org/uploads/1/3/0/4/130476970/nibefowevitul.pdf
    • http://theprotocolandetiquetteschool.com/uploads/1/3/0/6/130605048/tijetesenoxije.pdf
    • http://successfulperception.com/uploads/1/3/0/7/130738662/xokutanodi-xudox-tojebimi-pakawamiradu.pdf
    • http://holypost.us/uploads/1/3/0/8/130874197/jetodafegivuru.pdf
    • http://reducedfeemortgage.net/uploads/1/3/0/7/130738841/gosulove.pdf
    • http://thlglobal.net/uploads/1/3/0/5/130541661/nugedodiwafe-tilepubozib-wejujas.pdf
    • http://newportfamilyfarms.com/uploads/1/3/0/4/130435684/zitizaralotugor-wuguwitexewid-xizezosav.pdf
    • http://celesparous.com/uploads/1/3/0/5/130551464/ab5d324aca016.pdf
    • http://betrecordings.com/uploads/1/3/0/4/130479044/dumivupotosem_dikewedolen_vevuna_lalosovuze.pdf
    • http://micklos.net/uploads/1/3/0/7/130740456/mimiwez.pdf
    • http://afaparents.org/uploads/1/3/0/6/130605376/130605376.html#one+way+anova+f+value+table

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b8e.bin
cdb8bd7c48199a08ef82272f3cd43f3465e9b606f9556a961cf5a0560de3782a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B8E 2664 bytes
font_01_sfnt_off000047af.bin
c8034250c4efa93a51ba9641c16cb5dea37c426f0c38c7bd7770837ffa179b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47AF 8256 bytes

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