Malicious PDF — malware analysis report

Static analysis result for SHA-256 8959d88b336769c3…

MALICIOUS

PDF

47.1 KB Authoring application: PDF Studio
MD5: 0544dd782d447e45f1c7e5e4fa38e179 SHA-1: 3a8eac8a931f5d2d4e6a7f1e5f6de2a6c2a3b4f9 SHA-256: 8959d88b336769c39ec1bde9770034b1dc1f344508ddfec1d0427b546ebc180d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a potential for further malicious activity or redirection.

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://adrianaanderson.net/uploads/1/3/0/6/130621897/582e2b7d6f925.pdf
    • http://decorativeoutfitters.com/uploads/1/3/0/3/130313274/levijajofup_tibawevidefep_basub_vifoxofuxeri.pdf
    • http://midwifeaddison.com/uploads/1/3/0/2/130271128/8714005.pdf
    • http://mycorporateteambuilding.com/uploads/1/3/0/2/130287919/naved_bovefopufiku.pdf
    • http://mountbarkerstrathcatholic.com/uploads/1/3/0/4/130488694/loteme-jezutasoboreli-nadeso.pdf
    • http://negi.silaneguardbuy.info/uploads/2020/01/28/4821579.pdf
    • http://norascully.com/uploads/1/3/0/2/130289476/xikomofefot-difizoxe-nepopowij-dosudulenamifit.pdf
    • http://nicolejzimmer.com/uploads/1/3/0/5/130543063/nofexini.pdf
    • https://virupadolek.weebly.com/uploads/1/3/0/4/130489039/wetotaroxetizotova.pdf
    • http://arcmowercounty.org/uploads/1/3/0/3/130313123/baa1e3474d62.pdf
    • http://voiceschorale.org/uploads/1/3/0/5/130547038/4343104.pdf
    • https://fivikatuxidija.weebly.com/uploads/1/3/0/6/130604636/2255731.pdf
    • http://n80090.com/uploads/1/3/0/5/130543667/kanakajawexetewenara.pdf
    • http://sophiesrabbitry.com/uploads/1/3/0/5/130589281/siperezetuwaxumil.pdf
    • https://musafisozav.weebly.com/uploads/1/3/0/5/130590555/jebomurej.pdf
    • http://sportswigsonline.com/uploads/1/3/0/4/130483412/9308090.pdf
    • http://kenicholson.com/uploads/1/3/0/6/130620708/6910878.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/5/130552106/130552106.html#avchd+to+mp4+converter+free
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014f2.bin
8dd609fced9aec28976e5fe06ea74e45f5bf3976d67e44c48c5424fc5c5b3658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F2 7752 bytes
font_01_sfnt_off00006215.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 16036 bytes
font_02_sfnt_off000075e8.bin
1957428794578a072b8983e864e5701b52391162abfb2d6d14c6295fa8a16687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 6444 bytes

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