Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8b0724fbf0dfbe…

MALICIOUS

PDF

45.1 KB Authoring application: Serif PagePlus
MD5: b08ac9bf207f9fe7a799d97fcf84a9a2 SHA-1: 98182593bfa6ce3c2cfed3c02908bcb49de5ac40 SHA-256: fe8b0724fbf0dfbedec143ab201352579801d09a799caa9b4c2e64c4daf0fb16
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.003 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicating a link farm or distribution network. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', suggesting a phishing or traffic redirection scheme. The ML classifier also strongly flagged this as malicious. The embedded URLs are the primary IOCs, pointing to the likely distribution points.

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://webmail.desertdancetheatre.org/uploads/1/3/0/8/130874612/renad.pdf
    • http://richmondfutsal.com/uploads/1/3/0/3/130313463/9498310.pdf
    • http://stayusahotel-wb.devsite-1.com/uploads/1/3/0/5/130551208/nupejokewat.pdf
    • http://cincinnatihealthcarestaffing.com/uploads/1/3/0/5/130551374/48b4a27752b52d6.pdf
    • http://jeffreyirvinantiques.co.uk/uploads/1/3/0/4/130489572/9863912.pdf
    • http://newstokenpool.com/uploads/1/3/0/4/130483507/3184682.pdf
    • http://nowphotobooths.com/uploads/1/3/0/7/130739478/nawuj.pdf
    • http://xinshijiguojiyule.br3h.com/uploads/1/3/0/5/130539408/jubikovegorojusaw.pdf
    • http://vediskastrologi.dk/uploads/1/3/0/5/130539366/wukateridaf.pdf
    • http://epq.stwilfrids.com/uploads/1/3/0/4/130488396/5250097.pdf
    • http://drrobertlang.com/uploads/1/3/0/5/130539926/molasufixopo.pdf
    • http://freeeducationgrants.net/uploads/1/3/0/6/130604805/ribose.pdf
    • http://webmail.ladse.org/uploads/1/3/0/4/130483770/130483770.html#prueba+toxoplasmosis+embarazo+precio

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004115.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4115 16036 bytes
font_01_sfnt_off00005845.bin
f99a5ad989a17abddd03605c053bdeb7ed7ba2b264f52bdde0af4556ea72a0cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5845 8600 bytes

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