Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad700b7e2b5d03c…

MALICIOUS

PDF

56.7 KB Authoring application: Mobipocket Creator
MD5: 7f1bc94d848d681e2d6824f0e68c6b8e SHA-1: 33f785e78c2b464df55e7603e878df3de2ce4fe6 SHA-256: 5ad700b7e2b5d03c6bc5cd4b7384e35f261bc4682b67b7b3c61a10fcf9868d4c
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a mass external link farm, with many URLs pointing to other PDF files, suggesting a phishing or redirection scheme. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing malicious browser extensions or updates. ClamAV detection and ML classification confirm its malicious nature, likely related to the TtraffRobotInstall family. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://x0877193xstreamtravel.xsideas.com/uploads/1/3/0/3/130313022/361bf177d.pdf
    • http://curvo.org/uploads/1/3/0/2/130273762/sadigifor-kewogexo.pdf
    • http://studio-754.com/uploads/1/3/0/7/130775126/3318387.pdf
    • http://saeedalmuhairy.com/uploads/1/3/0/6/130639936/635288.pdf
    • http://getautomotiv.com/uploads/1/3/0/6/130621507/nedologoro.pdf
    • http://cedarlanesucculents.com/uploads/1/3/0/6/130621490/robaponudijonojula.pdf
    • http://adrianoconnor.com/uploads/1/3/0/6/130603896/goxanixuw-muwuwukutimowiz-xarivolin.pdf
    • http://gearaddiction.org/uploads/1/3/0/6/130604771/158460.pdf
    • http://survivingtwenties.com/uploads/1/3/0/7/130740211/3ce83ccd2.pdf
    • http://mizfamphoto.com/uploads/1/3/0/7/130775306/legafuxem.pdf
    • http://tag-walk-creative.com/uploads/1/3/0/5/130550911/gevabevu_bugos.pdf
    • http://stepsministries.me/uploads/1/3/0/3/130313120/2613487.pdf
    • http://thesleepover.net/uploads/1/3/0/4/130476145/kinize_xamiregemejuvo_wumumewomosal_kufitodiz.pdf
    • http://happyathomecare.us/uploads/1/3/0/2/130272963/70f871bd.pdf
    • http://o7ngg.bpmtc.com/uploads/1/3/0/8/130873838/130873838.html#3ds+max+2018+script+controller+crash
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd2.bin
afd8868629b61d85ec32a8a0de1ca84da82d48156cdd7447d7c4f51403cf5149		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD2 5244 bytes
font_01_sfnt_off0000800c.bin
2901ab68f1331b0c1cf432ee8af925c89d98aaae8c779e487e70d4f25d1f8584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 10104 bytes

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