Malicious PDF — malware analysis report

Static analysis result for SHA-256 990d8e0e65222c20…

MALICIOUS

PDF

35.9 KB Authoring application: GIMP
MD5: 4b6e16de90d3be95001abc81b5defbb5 SHA-1: 3d5fbbbe968dabb1d08ee881a4f6ee0b219f895a SHA-256: 990d8e0e65222c20d8c03e3c44f8467aaf328649411f4bbaf86d4023d98ef57f
128 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the presence of a visual download button lure suggest a phishing or malicious download campaign. The embedded URLs are part of this link farm, likely intended to redirect users to malicious content.

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://micremacion.com/uploads/1/3/0/5/130551586/gawenuvugogidurejuzo.pdf
    • http://wildernessadventureswest.com/uploads/1/3/0/6/130620975/2732fa5a9fd12.pdf
    • https://kidibibore.weebly.com/uploads/1/3/0/4/130476601/c45096b84f.pdf
    • http://allthingsk9s.com/uploads/1/3/0/5/130589213/828046.pdf
    • http://daxuwez.itilavto.ru/uploads/2020/01/28/9575507.pdf
    • https://jararakogawa.weebly.com/uploads/1/3/0/5/130588478/zipajaja-wasopitoduwir.pdf
    • http://shenandoahforestschool.com/uploads/1/3/0/6/130620631/e6ea55c454be2.pdf
    • http://lovuzodur.tv-android.ru/uploads/2020/01/28/terulazo-fatizirelejup.pdf
    • http://wizizu.lkfl.ru/uploads/2020/01/27/xujoxuvufawodelu.pdf
    • http://susanmastfund.org/uploads/1/3/0/5/130541924/130541924.html#quicken+2010+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013b6.bin
0f43d2f45521fc24f87158a0e77a3466c7c8ae2ee81c3b0d489f2e09be7725ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6 8808 bytes

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