Malicious PDF — malware analysis report

Static analysis result for SHA-256 a257f90d895fbf0a…

MALICIOUS

PDF

40.1 KB Authoring application: Pdftk
MD5: fb49319ef7529fa0440494d58f4f051b SHA-1: 3b3fdc3a1a0419293ffaf5cd31c90d40fe3ae075 SHA-256: a257f90d895fbf0acb75c6d2a913e328991f848d669ae52f4ada670ee419f8cd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, indicating a link farm or redirection strategy. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent, likely phishing or traffic redirection. The document body itself contains garbled text and some URLs, further supporting the malicious link farm attack pattern.

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://zuse.evaluados21.com/uploads/2020/01/29/tilor_gadepebemif_lufulamunatutif_faxetedubux.pdf
    • http://thephenomenallife.com/uploads/1/3/0/5/130550652/kuwaluzegelujasa.pdf
    • http://vavaxo.woohoogay.com/uploads/2020/01/27/sixorur_lipaxexul.pdf
    • http://atticrodentbarriersystemsonline.com/uploads/1/3/0/6/130620801/senedozujuminage.pdf
    • http://mtcsrussell.com/uploads/1/3/0/4/130493248/jelukerosowezi_nafik_joxobixejo.pdf
    • http://epsaofficial.eu/uploads/1/3/0/2/130288722/kutitijizuvarod.pdf
    • http://welenuzu.hardtoken.store/uploads/2020/01/28/luzijek.pdf
    • http://metalsbullbear.com/uploads/1/3/0/3/130379676/powuvow-jorigowu.pdf
    • http://xududojux.radostnasha.club/uploads/2020/01/28/5875627.pdf
    • http://inspirekai.com/uploads/1/3/0/5/130589230/zosakib.pdf
    • http://mjacoby88.com/uploads/1/3/0/2/130287454/6b7bc447.pdf
    • http://zow.krasota12.ru/uploads/2020/01/28/2140700.pdf
    • https://fopezizevel.weebly.com/uploads/1/3/0/4/130489346/6482488.pdf
    • http://sharoncraryhandwovenrugstapestry.com/uploads/1/3/0/2/130289763/zakixudoz.pdf
    • https://vebesose.weebly.com/uploads/1/3/0/4/130475994/c64bb7.pdf
    • http://ketskremas.com/uploads/1/3/0/5/130543837/lakori.pdf
    • http://uhuruacademy.weebly.com/uploads/1/3/0/6/130604635/fugesexedodim.pdf
    • http://rubberbymok.com/uploads/1/3/0/5/130550931/944151aa623a92.pdf
    • http://absolutellc.us/uploads/1/3/0/6/130604289/lufevikivutefew.pdf
    • http://nbruc.weebly.com/uploads/1/3/0/2/130272981/tosad.pdf
    • http://trendshops7.fun/uploads/2020/01/27/momajotig.pdf
    • http://vetim.paypal-limitted.com/uploads/2020/01/27/9008996.pdf
    • http://nicolettabuildingcontractors.com/uploads/1/3/0/2/130289163/jesijetipigan-lunobalivowo-rejerifidu-loziguxexeges.pdf
    • http://keve.trangsucvid.com/uploads/2020/01/28/gixudiwupazesuj-xisexat.pdf
    • http://cityonloc.com/uploads/1/3/0/5/130588282/130588282.html#fluoroscopy+guided+joint+injection

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000176b.bin
84843cfa2dac13a10f67fd67747f63a643399f5d9ef0fcbcf7a7f8149a47f180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176B 7556 bytes

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