Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f536e8908c81fd…

MALICIOUS

PDF

42.7 KB Authoring application: QPDF
MD5: da8aba203c6fc0c50af77022611f9756 SHA-1: 0e87351ae4045ab223cffd77ab5e99abee29d562 SHA-256: 65f536e8908c81fd4855dbe25488a21c101b155067118bd03d54349f15c066ed
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The file contains a large number of embedded URLs pointing to other PDF documents on various domains. The ML classifier also assigned a high probability of maliciousness. The primary attack pattern appears to be the distribution of a link farm to potentially distribute further malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://carasoul.com/uploads/1/3/0/5/130552034/445499.pdf
    • http://web-highschool.com/uploads/1/3/0/6/130605278/7632165.pdf
    • http://startapper.com/uploads/1/3/0/2/130288488/2006746.pdf
    • http://griefresolve.com/uploads/1/3/0/5/130542692/9204627.pdf
    • http://agroricambi.com/uploads/1/3/0/3/130379067/kawaz_zigotetek_zekuxuku_fagozusodolareb.pdf
    • http://answersoperation.com/uploads/1/3/0/2/130287738/najotevalilixegutoma.pdf
    • http://mrvangeelsclass.com/uploads/1/3/0/8/130813521/04f825.pdf
    • http://toaishow.org/uploads/1/3/0/6/130640174/wukulitirila.pdf
    • http://www.aidesignz.com/uploads/1/3/0/6/130621058/bupadadawukafil_mapeli_farol.pdf
    • http://romanticism55.com/uploads/1/3/0/6/130640110/rorelafevag_wafagup.pdf
    • http://kbkornholegames.com/uploads/1/3/0/6/130621324/5049892.pdf
    • http://www.mementomorimakeup.com/uploads/1/3/0/2/130291822/916002.pdf
    • http://www.goodsbygoldieroxx.com/uploads/1/3/0/6/130621250/misujulunamum.pdf
    • http://laventanadecali.com/uploads/1/3/0/5/130588490/repodedeguwap-xewifutanutuze-duxubetorawevo-gopudameburixup.pdf
    • http://mindfulmoto.us/uploads/1/3/0/7/130775342/kaguzogiwolerimiki.pdf
    • http://www.ratemyair.com/uploads/1/3/0/8/130873771/4797416.pdf
    • http://mojavecrossingcasino.com/uploads/1/3/0/5/130546333/5383000.pdf
    • http://tamils.directory/uploads/1/3/0/7/130739330/xedan-penojigap-tazexipukalo-dupasakizabo.pdf
    • http://sta-66-99-58-198.ladse.org/uploads/1/3/0/4/130435966/130435966.html#i+am+sahara+rose+dosha+quiz
    • 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_off000030ed.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 16036 bytes
font_01_sfnt_off00004829.bin
9f2cae7ad97ec365f737f94d38e82e48ec06179398ffeb176c8b11f96bd080b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4829 8188 bytes

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