Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0dc72339d5012f…

MALICIOUS

PDF

36.6 KB Authoring application: Adobe PDF Library 9.0
MD5: e54b91eccc1e832693eaf6ffe6bd3bae SHA-1: dd3c34557e4a86547923af35475a587b5ebbe2be SHA-256: 5d0dc72339d5012f374811aa26bc2156d6cf780bd8f2cd91f6865f1652eb5d0a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used to distribute malware or conduct phishing attacks. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting the document's primary purpose is to redirect users to these malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ryanmurrayconductor.com/uploads/1/3/0/3/130379175/tasasotesofoguwek.pdf
    • http://tortugamobile.com/uploads/1/3/0/6/130640067/6883853.pdf
    • https://worasapam.weebly.com/uploads/1/3/0/5/130541023/5bb60f9.pdf
    • http://liveturn.ru/uploads/2020/01/28/2bdbb20f.pdf
    • http://90894735.nhd.weebly.com/uploads/1/3/0/6/130604373/kulaf.pdf
    • http://kimberlycookimages.com/uploads/1/3/0/4/130483346/nemulaviragos.pdf
    • https://zemozujabuwixux.weebly.com/uploads/1/3/0/4/130476035/5589286e3.pdf
    • http://namdalseidmusikklag.no/uploads/1/3/0/6/130604488/pivusofuta_buvifaxenagu_xukivesu_notukomoselovi.pdf
    • http://nanascountrystore.com/uploads/1/3/0/4/130483759/ketefaji.pdf
    • http://myoffgridpower.com/uploads/1/3/0/6/130603749/givakokisugebumi.pdf
    • http://whimsicalwatercolors.weebly.com/uploads/1/3/0/2/130289243/df9c4d2bba.pdf
    • http://fixaraves.sabuyjaishopping.com/uploads/2020/01/28/xujot.pdf
    • https://runivepozonil.weebly.com/uploads/1/3/0/4/130435500/4581179.pdf
    • http://doeverythingwithgrace.com/uploads/1/3/0/2/130291803/81eb1d5d3c.pdf
    • http://rockthedam.org/uploads/1/3/0/4/130489926/9994758.pdf
    • http://helps-disputed-accountverify834.com/uploads/1/3/0/4/130477110/vuzoworemezeriz.pdf
    • http://pezo.quran-media.online/uploads/2020/01/29/ef2c37604b3.pdf
    • http://santorius.ru/uploads/2020/01/28/marizemudoneb.pdf
    • http://thekellyzoo.com/uploads/1/3/0/5/130539179/vasisazebuvuk_segugofaguf_zomutarerozigox.pdf
    • http://ddrncboa.com/uploads/1/3/0/5/130590436/6841380.pdf
    • http://buvuj.legitimateparttimeworkfromhome.com/uploads/2020/01/28/1ba16e.pdf
    • http://kerchevaleyecare.com/uploads/1/3/0/5/130543107/bowabetujos_kumefirazojopaj_zezozesipatuz_mozatazugaw.pdf
    • http://southernheritagenewsletter.com/uploads/1/3/0/5/130588966/badififujenoxokawom.pdf
    • http://lidi.greecestyle.ru/uploads/2020/01/28/9532918158a.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/3/130313191/130313191.html#bitzer+screw+compressor+service+manual+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000017d6.bin
d74c8afea96a88791d707df65ba9501486b2a5141010ecc684e11a53272190c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D6 8280 bytes

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