Malicious PDF — malware analysis report

Static analysis result for SHA-256 4527894e841f55c8…

MALICIOUS

PDF

34.2 KB Authoring application: QPDF
MD5: 96ff587f2e92091946fe190dd63c3ed2 SHA-1: 0ffa8e03c6339534d16752142e86f9ea942dd1d6 SHA-256: 4527894e841f55c8921391ce254e757baa0fc7cbd2f03421b6c4182ba79f0b58
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support a malicious classification. The primary attack pattern involves directing users to a vast collection of external PDF documents, likely for SEO spam or phishing campaigns. No scripts were extracted from this sample.

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 https://mogakipato.weebly.com/uploads/1/3/0/5/130540567/waxirejapa.pdf
    • http://jasonwiff.com/uploads/1/3/0/2/130270980/lerinerobiviw_wamijowimak_validefo_bilurasaki.pdf
    • http://mus.stellaz-66.ru/uploads/2020/01/27/vorakiruna_dapulejojaxut.pdf
    • https://rexisafow.weebly.com/uploads/1/3/0/5/130539923/7c0c2d2b0.pdf
    • http://lotazesap.zerosanityservers.com/uploads/2020/01/29/3b0d91472.pdf
    • http://simplyyogavancouver.com/uploads/1/3/0/4/130483397/tedavako_timadu_kedutizu.pdf
    • http://nicolleespinal.com/uploads/1/3/0/5/130588834/1528367.pdf
    • http://bagabuki.profmediarus.ru/uploads/2020/01/28/jabowej.pdf
    • http://torreazul.es/uploads/1/3/0/6/130620453/1737957.pdf
    • http://help-tao.com/uploads/2020/01/29/remenuzazuwika.pdf
    • https://kidibibore.weebly.com/uploads/1/3/0/4/130476601/c45096b84f.pdf
    • http://solofit.ru/uploads/2020/01/27/f321dd214e.pdf
    • http://wuwexup.horeca-special.ru/uploads/2020/01/27/6657268.pdf
    • https://sudekanup.weebly.com/uploads/1/3/0/2/130287932/4298205.pdf
    • http://algiers-tricentennial.net/uploads/1/3/0/6/130639400/sigodufanul-rakuxus-tubosiz-migegigexezazek.pdf
    • http://memejigojo.geo-leo.com/uploads/2020/01/28/dadunubo-foruwinalujumo.pdf
    • http://pinilu.ourverify.com/uploads/2020/01/29/jetinixek.pdf
    • http://toreked.ddnshit.com/uploads/2020/01/27/fomikatav_fotupapezowuba_rujoligunete.pdf
    • http://nzvnhealth.weebly.com/uploads/1/3/0/5/130543084/1277347.pdf
    • http://productionairservices.com/uploads/1/3/0/4/130476172/3dc0b95.pdf
    • http://dalu.travelsam.ru/uploads/2020/01/29/nabadawab_jabenavimujes_dikib_newov.pdf
    • http://kevinautocare.com/uploads/1/3/0/5/130589423/9836448.pdf
    • http://theconstructionco.biz/uploads/1/3/0/5/130542729/xolasip_riwejowisajokig.pdf
    • http://nikolasstrubbe.com/uploads/1/3/0/5/130588437/muxux_katapumaj_gupofep.pdf
    • http://abbottconstruction360.com/uploads/1/3/0/6/130639428/3464185.pdf
    • http://michaudwellness.com/uploads/1/3/0/6/130639802/130639802.html#newborn+baby+pictures

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001726.bin
0a06b6dc11a64c2b5edf213dd5f96c9dd9b51fa0985eac1f62a8b606c83c0f5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1726 6788 bytes