  The bulk magnetic susceptibility $\chi(T,B)$ of
YbRh$_2$(Si$_{0.95}$Ge$_{0.05}$)$_2$ has been investigated %by ac-and
dc-magnetometry at low temperatures and close to the field-induced quantum
critical point at $B_c=0.027$ T. For $B\leq 0.05$ T a Curie-Weiss law with a
negative Weiss temperature is observed at temperatures below 0.3 K. Outside
this region, the susceptibility indicates ferromagnetic quantum critical
fluctuations: $\chi(T)\propto T^{-0.6}$ above 0.3 K, while at low temperatures
the Pauli susceptibility follows $\chi_0\propto (B-B_c)^{-0.6}$ and scales with
the coefficient of the $T^2$ term in the electrical resistivity. The
Sommerfeld-Wilson ratio is highly enhanced and increases up to 30 close to the
critical field.
