Malicious PDF — malware analysis report

Static analysis result for SHA-256 631641cc2a40b79b…

MALICIOUS

PDF

42.5 KB Authoring application: ImageMagick
MD5: 80e232d1283b28f28647f35a950fa2f6 SHA-1: cfabb05ee496ee3374d1dad35f9d81d7f726c340 SHA-256: 631641cc2a40b79b1a1aa452246ef84edb579cd8afd61dcfbdd79ccd3cc8f3a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs likely lead to further malicious content or phishing pages, suggesting a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 https://vekogawiregalo.weebly.com/uploads/1/3/0/4/130483564/2f948a2fc.pdf
    • http://wildoncherrysalon.com/uploads/1/3/0/3/130312929/39a77.pdf
    • http://dofalivos.meessays.info/uploads/2020/01/28/tituxej-lirilametodoma-naxezumolukagu.pdf
    • http://nathansdetailing.net/uploads/1/3/0/4/130488105/zililovexudenipu.pdf
    • http://delaf.supervasya.ru/uploads/2020/01/28/41443d.pdf
    • https://fanadelonilavo.weebly.com/uploads/1/3/0/3/130313641/vekadanafebisabe.pdf
    • http://moneylifelessions.com/uploads/1/3/0/2/130289481/d5b67fc.pdf
    • http://lowcostbusinesswebsites.com/uploads/1/3/0/5/130540286/pojexuji_gaximowupim.pdf
    • http://wafa.site-elit.ru/uploads/2020/01/28/pubepominop.pdf
    • http://naturesworks.net/uploads/1/3/0/6/130639856/5489678.pdf
    • http://jenedotip.forexpro-au.club/uploads/2020/01/27/3c4af08f.pdf
    • http://djsacademy.com/uploads/1/3/0/5/130588927/130588927.html#traits+of+mature+self+actualized+person
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001311.bin
50fdd554ea12b8c907ea3092b70be8f4eb4181d0606f82d763ab241b5a844d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311 8280 bytes
font_01_sfnt_off00005fb4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 16036 bytes

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