Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c81d32db885d81d…

MALICIOUS

PDF

37.2 KB Authoring application: Smallpdf Desktop
MD5: a032c561e3a4bc849183509a57165ab8 SHA-1: 1cc2c3937fae646935ac1443b741d3a79d30ccab SHA-256: 8c81d32db885d81dad4186398ec01b6706263311ed38b6150f851a53da5d25fb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall. The embedded URLs suggest a phishing or SEO spam campaign, aiming to redirect users to potentially malicious content hosted on numerous domains. No scripts were extracted from this sample.

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 http://strokeawarenessandrecovery.com/uploads/1/3/0/7/130776434/64f022630.pdf
    • http://costumearty.com/uploads/1/3/0/3/130324065/dekurosuf_zewadojexodokow_rodelotekabef.pdf
    • http://www.selkirkbordercollies.com/uploads/1/3/0/4/130479171/niwamejefopo-jawupelurofiwu.pdf
    • http://spillerwilliams.com/uploads/1/3/0/5/130539612/kagej.pdf
    • http://thenaivegardener.com/uploads/1/3/0/9/130969222/nofeludozipi.pdf
    • http://seventhgayadventists.com/uploads/1/3/0/4/130435902/fozedubolegibodofeto.pdf
    • http://thatframingplace.com.au/uploads/1/3/0/5/130588712/425fda29d4569.pdf
    • http://mybiohelp.com/uploads/1/3/0/5/130540280/morevojuwidebep_guxofol.pdf
    • http://pugetsoundbfw.com/uploads/1/3/0/3/130312919/runotaletedil.pdf
    • http://roofingrockville.com/uploads/1/3/0/8/130814966/vamojixuxi.pdf
    • http://niallbishop.com/uploads/1/3/0/2/130289755/200c0d8.pdf
    • http://morningtonpeninsulacaravanstorage.com/uploads/1/3/0/2/130271099/gatosotufipax.pdf
    • http://74-123-73-217.mgwnet.com/uploads/1/3/0/6/130639659/79a32.pdf
    • http://createescapeworkshops.com/uploads/1/3/0/5/130550835/1434956.pdf
    • http://nowhiringheroes.net/uploads/1/3/0/6/130620750/jazebejudaz-wulanor.pdf
    • http://naramataplayschool.com/uploads/1/3/0/2/130270994/f9c5fb8872b1.pdf
    • http://mta-sts.mx.sfa-chelmsford.org/uploads/1/3/0/5/130545954/197926.pdf
    • http://taosstockphotos.com/uploads/1/3/0/5/130538863/9006697.pdf
    • http://deepculture.clothing/uploads/1/3/0/3/130313167/nemag.pdf
    • http://sthfromnth.com/uploads/1/3/0/4/130435685/bokirop-xufurol-piwoz.pdf
    • http://shirtleaks.net/uploads/1/3/0/7/130738753/vubavasiviw_panimag_xugefobiga.pdf
    • http://deborahsnider.com/uploads/1/3/0/2/130287413/130287413.html#efficiency+of+full+wave+rectifier+with+filter
    • http://roofingrockville.com/uploads/1/3/0/8/130814966/v

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003290.bin
9cee0e0d32d7fe38041c8f46f7a10e7eafb80bfde96d7e987fecdc4ca93bd83f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3290 7252 bytes

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