Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0d3f7b6569c339…

MALICIOUS

PDF

40.6 KB Authoring application: pdf-parser
MD5: e19af54839f85b226e7eff9234d915da SHA-1: 359a27e2d4dd8690c47078592ec1cb2f3e6016db SHA-256: cf0d3f7b6569c3394f83c53e6cee4ef700fd11be0ccea309e3b985772a82c13f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, indicative of a link farm or SEO spam campaign. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings.

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://tasurupate.xalat24.ru/uploads/2020/01/29/402a8.pdf
    • http://csraisc2.com/uploads/1/3/0/5/130551266/bawawerififar.pdf
    • http://aldodelgado.net/uploads/1/3/0/5/130589401/nafapuzekifi.pdf
    • http://atlantabasementwaterproofingco.com/uploads/1/3/0/5/130542831/3779006.pdf
    • http://arlotrainor.com/uploads/1/3/0/5/130588468/melevanotejufa-rewiwitegavob-jeririsekebil-lifasir.pdf
    • http://momhustleology.com/uploads/1/3/0/6/130621124/zufonopapin.pdf
    • http://eggyums.com/uploads/1/3/0/5/130543402/a3b4fc.pdf
    • http://novellaproposals.com/uploads/1/3/0/2/130289274/nofujigevu-ranari-dojabuxenijoxem-bizusa.pdf
    • http://alloexo.com/uploads/1/3/0/4/130489220/0f2902393.pdf
    • http://mmjplantation.org/uploads/1/3/0/5/130589178/5368668.pdf
    • http://vez.portal-doempreendedordigital.com/uploads/2020/01/29/vufimujalonunove.pdf
    • http://aeprilsarcana.com/uploads/1/3/0/2/130289541/86f0060076543a.pdf
    • http://keyliquor.com/uploads/1/3/0/4/130488543/rovekosuvom.pdf
    • http://texanhomestudy.com/uploads/1/3/0/6/130639664/namosugesolo-mavizilobom-xawewiv.pdf
    • https://rulowifapovik.weebly.com/uploads/1/3/0/6/130604512/xufefasezota_danixotisatibi_varoted.pdf
    • http://sqeda.com/uploads/1/3/0/6/130603841/mamareveraser-dewubukebed-nejope-pajarabuxom.pdf
    • http://safedrycincinnati.com/uploads/1/3/0/2/130288707/fovuzalabaxafux.pdf
    • http://civlirightsreenactor.com/uploads/1/3/0/6/130620667/buref_panij_wexil.pdf
    • http://adjustingspecialists.com/uploads/1/3/0/6/130604414/6600121.pdf
    • http://milanchurch.com/uploads/1/3/0/4/130488750/5e709d8d.pdf
    • https://janonetujeja.weebly.com/uploads/1/3/0/3/130312969/jajodijumez_fezebumojupiro_pibetevezof_pijegon.pdf
    • http://mombligation.net/uploads/1/3/0/6/130639544/4509180.pdf
    • http://blubloggs.com/uploads/1/3/0/3/130379371/bapivuloke.pdf
    • http://alebalieiro.cl/uploads/1/3/0/4/130490314/jilomom.pdf
    • http://advance-it.net/uploads/1/3/0/5/130539048/130539048.html#bangla+song+imran+new

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001761.bin
85d03d04a11694293477ce00b0abdbe7b52ee74509371439037a56aa4cb366a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1761 7632 bytes
font_01_sfnt_off0000589c.bin
602a2ea0a9c3c34a827681249151f91e361d20f4164369be580788be391d4eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x589C 7380 bytes