Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6effa4239be265…

MALICIOUS

PDF

47.6 KB Authoring application: Pdftk
MD5: da1a155f339c11333defa68b41a99939 SHA-1: 3d0c2c374372bf3299c953188037d91c00b93413 SHA-256: 3f6effa4239be265fa38df652f985886b04f89e46fed9f413041a80a1553abb4
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is often used for SEO poisoning or to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body content is heavily corrupted and does not provide further context on the specific lure.

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://terratechwiki.com/uploads/1/3/0/3/130313107/binazifutozuw.pdf
    • http://thebuttkickindietitian.com/uploads/1/3/0/6/130639709/tuwetufaf.pdf
    • http://ludditetechnologies.net/uploads/1/3/0/7/130775808/9a6e85ec370.pdf
    • http://encyclopediasonica.com/uploads/1/3/0/7/130776344/mapujazumuwax.pdf
    • http://nikhitavaddineni.com/uploads/1/3/0/8/130813903/benati.pdf
    • http://afrocubanforum.org/uploads/1/3/0/7/130776478/418662.pdf
    • http://theoxfordhouseofbeauty.com/uploads/1/3/0/2/130272336/nebulekitezabidasijo.pdf
    • http://newbernapp.com/uploads/1/3/0/8/130814157/saguwulule.pdf
    • http://adentaaustralia.com/uploads/1/3/0/2/130289393/84829f.pdf
    • http://milledgevillepd.org/uploads/1/3/0/4/130435701/615930.pdf
    • http://newtouchstone.com/uploads/1/3/0/5/130551154/dutexomogidasawejaxi.pdf
    • http://djprince.info/uploads/1/3/0/8/130874593/8963731.pdf
    • http://myabloomstore.com/uploads/1/3/0/6/130620979/1556124.pdf
    • http://rikatsutsui.com/uploads/1/3/0/6/130620503/c143541.pdf
    • http://mytempdomain.club/uploads/1/3/0/3/130323647/fituwidoxogojewazos.pdf
    • http://totalplasma.org/uploads/1/3/0/3/130313468/34a4faf.pdf
    • http://mymoneyways.com/uploads/1/3/0/8/130813557/zirojivuzaroxex.pdf
    • http://bouncyballcatastrophe.com/uploads/1/3/0/4/130476203/2074238.pdf
    • http://pizzapartyhero.com/uploads/1/3/0/4/130435536/7337c4.pdf
    • http://podollangpis.devsite-1.com/uploads/1/3/0/6/130639600/130639600.html#vivax+malaria+and+thrombocytopenia

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043e4.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43E4 16036 bytes
font_01_sfnt_off00005b21.bin
7f8a830a46f8fbf9c8154da2a29a58fe3519fb1a0a53c3e39cc3556ea5ec521a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B21 8412 bytes

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